109997131 has 2 divisors, whose sum is σ = 109997132. Its totient is φ = 109997130.

The previous prime is 109997119. The next prime is 109997149. The reversal of 109997131 is 131799901.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 109997131 - 2¹⁷ = 109866059 is a prime.

It is a super-2 number, since 2×109997131² = 24198737656462322, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (109997231) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 54998565 + 54998566.

It is an arithmetic number, because the mean of its divisors is an integer number (54998566).

Almost surely, 2^109997131 is an apocalyptic number.

109997131 is a deficient number, since it is larger than the sum of its proper divisors (1).

109997131 is an equidigital number, since it uses as much as digits as its factorization.

109997131 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 15309, while the sum is 40.

The square root of 109997131 is about 10487.9517066012. The cubic root of 109997131 is about 479.1378200387.

The spelling of 109997131 in words is "one hundred nine million, nine hundred ninety-seven thousand, one hundred thirty-one".