109997491931 has 2 divisors, whose sum is σ = 109997491932. Its totient is φ = 109997491930.

The previous prime is 109997491897. The next prime is 109997492009. The reversal of 109997491931 is 139194799901.

It is a weak prime.

It is an emirp because it is prime and its reverse (139194799901) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 109997491931 - 2²² = 109993297627 is a prime.

It is a super-2 number, since 2×109997491931² (a number of 23 digits) contains 22 as substring.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (109997494931) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 54998745965 + 54998745966.

It is an arithmetic number, because the mean of its divisors is an integer number (54998745966).

Almost surely, 2^109997491931 is an apocalyptic number.

109997491931 is a deficient number, since it is larger than the sum of its proper divisors (1).

109997491931 is an equidigital number, since it uses as much as digits as its factorization.

109997491931 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4960116, while the sum is 62.

The spelling of 109997491931 in words is "one hundred nine billion, nine hundred ninety-seven million, four hundred ninety-one thousand, nine hundred thirty-one".