8117469409 has 27 divisors (see below), whose sum is σ = 9645821523. Its totient is φ = 6811333200.

The previous prime is 8117469397. The next prime is 8117469421. The reversal of 8117469409 is 9049647118.

The square root of 8117469409 is 90097.

It is a perfect power (a square), and thus also a powerful number.

It is an interprime number because it is at equal distance from previous prime (8117469397) and next prime (8117469421).

It can be written as a sum of positive squares in only one way, i.e., 263965009 + 7853504400 = 16247^2 + 88620^2 .

It is not a de Polignac number, because 8117469409 - 2²¹ = 8115372257 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (49).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (8117469209) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 38471314 + ... + 38471524.

It is an arithmetic number, because the mean of its divisors is an integer number (357252649).

Almost surely, 2^8117469409 is an apocalyptic number.

8117469409 is the 90097-th square number.

8117469409 is the 45049-th centered octagonal number.

It is an amenable number.

8117469409 is a deficient number, since it is larger than the sum of its proper divisors (1528352114).

8117469409 is an frugal number, since it uses more digits than its factorization.

8117469409 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 558 (or 279 counting only the distinct ones).

The product of its (nonzero) digits is 435456, while the sum is 49.

The cubic root of 8117469409 is about 2009.7415910797.

Multiplying 8117469409 by its sum of digits (49), we get a square (397756001041 = 630679²).

8117469409 divided by its sum of digits (49) gives a square (165662641 = 12871²).

The spelling of 8117469409 in words is "eight billion, one hundred seventeen million, four hundred sixty-nine thousand, four hundred nine".