108691313 has 4 divisors (see below), whose sum is σ = 109811940. Its totient is φ = 107570688.

The previous prime is 108691291. The next prime is 108691321. The reversal of 108691313 is 313196801.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 14348944 + 94342369 = 3788^2 + 9713^2 .

It is a cyclic number.

It is not a de Polignac number, because 108691313 - 2¹⁸ = 108429169 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 108691313.

It is not an unprimeable number, because it can be changed into a prime (108690313) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 560168 + ... + 560361.

It is an arithmetic number, because the mean of its divisors is an integer number (27452985).

Almost surely, 2^108691313 is an apocalyptic number.

It is an amenable number.

108691313 is a deficient number, since it is larger than the sum of its proper divisors (1120627).

108691313 is an equidigital number, since it uses as much as digits as its factorization.

108691313 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1120626.

The product of its (nonzero) digits is 3888, while the sum is 32.

The square root of 108691313 is about 10425.5126013065. The cubic root of 108691313 is about 477.2342579897.

The spelling of 108691313 in words is "one hundred eight million, six hundred ninety-one thousand, three hundred thirteen".