109137731 has 2 divisors, whose sum is σ = 109137732. Its totient is φ = 109137730.

The previous prime is 109137727. The next prime is 109137733. The reversal of 109137731 is 137731901.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 109137731 - 2² = 109137727 is a prime.

It is a super-2 number, since 2×109137731² = 23822088655656722, which contains 22 as substring.

Together with 109137733, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (109137733) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 54568865 + 54568866.

It is an arithmetic number, because the mean of its divisors is an integer number (54568866).

Almost surely, 2^109137731 is an apocalyptic number.

109137731 is a deficient number, since it is larger than the sum of its proper divisors (1).

109137731 is an equidigital number, since it uses as much as digits as its factorization.

109137731 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3969, while the sum is 32.

The square root of 109137731 is about 10446.9005451378. The cubic root of 109137731 is about 477.8867325559.

The spelling of 109137731 in words is "one hundred nine million, one hundred thirty-seven thousand, seven hundred thirty-one".