109999999931 has 2 divisors, whose sum is σ = 109999999932. Its totient is φ = 109999999930.

The previous prime is 109999999909. The next prime is 109999999937. The reversal of 109999999931 is 139999999901.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-109999999931 is a prime.

It is a super-2 number, since 2×109999999931² (a number of 23 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (109999999937) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 54999999965 + 54999999966.

It is an arithmetic number, because the mean of its divisors is an integer number (54999999966).

Almost surely, 2^109999999931 is an apocalyptic number.

109999999931 is a deficient number, since it is larger than the sum of its proper divisors (1).

109999999931 is an equidigital number, since it uses as much as digits as its factorization.

109999999931 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 129140163, while the sum is 77.

The spelling of 109999999931 in words is "one hundred nine billion, nine hundred ninety-nine million, nine hundred ninety-nine thousand, nine hundred thirty-one".