109135691 has 6 divisors (see below), whose sum is σ = 126953820. Its totient is φ = 93544836.

The previous prime is 109135687. The next prime is 109135709. The reversal of 109135691 is 196531901.

It is not a de Polignac number, because 109135691 - 2² = 109135687 is a prime.

It is not an unprimeable number, because it can be changed into a prime (109135991) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1113581 + ... + 1113678.

It is an arithmetic number, because the mean of its divisors is an integer number (21158970).

Almost surely, 2^109135691 is an apocalyptic number.

109135691 is a deficient number, since it is larger than the sum of its proper divisors (17818129).

109135691 is an equidigital number, since it uses as much as digits as its factorization.

109135691 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2227273 (or 2227266 counting only the distinct ones).

The product of its (nonzero) digits is 7290, while the sum is 35.

The square root of 109135691 is about 10446.8029080671. The cubic root of 109135691 is about 477.8837549880.

The spelling of 109135691 in words is "one hundred nine million, one hundred thirty-five thousand, six hundred ninety-one".