8209291401 has 6 divisors (see below), whose sum is σ = 11857865370. Its totient is φ = 5472860928.

The previous prime is 8209291393. The next prime is 8209291421. The reversal of 8209291401 is 1041929028.

8209291401 is a `hidden beast` number, since 82 + 0 + 92 + 91 + 401 = 666.

It can be written as a sum of positive squares in only one way, i.e., 7009708176 + 1199583225 = 83724^2 + 34635^2 .

It is not a de Polignac number, because 8209291401 - 2³ = 8209291393 is a prime.

It is not an unprimeable number, because it can be changed into a prime (8209291421) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 456071736 + ... + 456071753.

It is an arithmetic number, because the mean of its divisors is an integer number (1976310895).

Almost surely, 2^8209291401 is an apocalyptic number.

It is an amenable number.

8209291401 is a deficient number, since it is larger than the sum of its proper divisors (3648573969).

8209291401 is a wasteful number, since it uses less digits than its factorization.

8209291401 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 912143495 (or 912143492 counting only the distinct ones).

The product of its (nonzero) digits is 10368, while the sum is 36.

The square root of 8209291401 is about 90605.1400363136. The cubic root of 8209291401 is about 2017.2910294284.

The spelling of 8209291401 in words is "eight billion, two hundred nine million, two hundred ninety-one thousand, four hundred one".