8171365249 has 4 divisors (see below), whose sum is σ = 8171584960. Its totient is φ = 8171145540.

The previous prime is 8171365201. The next prime is 8171365291. The reversal of 8171365249 is 9425631718.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 8171365249 - 2¹¹ = 8171363201 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 8171365199 and 8171365208.

It is not an unprimeable number, because it can be changed into a prime (8171365649) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 38709 + ... + 133570.

It is an arithmetic number, because the mean of its divisors is an integer number (2042896240).

Almost surely, 2^8171365249 is an apocalyptic number.

It is an amenable number.

8171365249 is a deficient number, since it is larger than the sum of its proper divisors (219711).

8171365249 is a wasteful number, since it uses less digits than its factorization.

8171365249 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 219710.

The product of its digits is 362880, while the sum is 46.

The square root of 8171365249 is about 90395.6041464407. The cubic root of 8171365249 is about 2014.1796683357.

The spelling of 8171365249 in words is "eight billion, one hundred seventy-one million, three hundred sixty-five thousand, two hundred forty-nine".