8170918997 has 4 divisors (see below), whose sum is σ = 8172058080. Its totient is φ = 8169779916.

The previous prime is 8170918991. The next prime is 8170919021. The reversal of 8170918997 is 7998190718.

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 8170918997 - 2²⁴ = 8154141781 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8170918991) 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, 558713 + ... + 573150.

It is an arithmetic number, because the mean of its divisors is an integer number (2043014520).

Almost surely, 2^8170918997 is an apocalyptic number.

It is an amenable number.

8170918997 is a deficient number, since it is larger than the sum of its proper divisors (1139083).

8170918997 is a wasteful number, since it uses less digits than its factorization.

8170918997 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1139082.

The product of its (nonzero) digits is 2286144, while the sum is 59.

The square root of 8170918997 is about 90393.1357847486. The cubic root of 8170918997 is about 2014.1430017551.

The spelling of 8170918997 in words is "eight billion, one hundred seventy million, nine hundred eighteen thousand, nine hundred ninety-seven".