31369368997 has 8 divisors (see below), whose sum is σ = 31470183576. Its totient is φ = 31268600832.

The previous prime is 31369368931. The next prime is 31369369013. The reversal of 31369368997 is 79986396313.

It is a Cunningham number, because it is equal to 177114²+1.

It can be written as a sum of positive squares in 4 ways, for example, as 8459216676 + 22910152321 = 91974^2 + 151361^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 31369368997 - 2¹¹ = 31369366949 is a prime.

It is a super-2 number, since 2×31369368997² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31369368097) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1776303 + ... + 1793875.

It is an arithmetic number, because the mean of its divisors is an integer number (3933772947).

Almost surely, 2^31369368997 is an apocalyptic number.

It is an amenable number.

31369368997 is a deficient number, since it is larger than the sum of its proper divisors (100814579).

31369368997 is a wasteful number, since it uses less digits than its factorization.

31369368997 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23207.

The product of its digits is 39680928, while the sum is 64.

The spelling of 31369368997 in words is "thirty-one billion, three hundred sixty-nine million, three hundred sixty-eight thousand, nine hundred ninety-seven".