123613691 has 4 divisors (see below), whose sum is σ = 126488472. Its totient is φ = 120738912.

The previous prime is 123613687. The next prime is 123613703. The reversal of 123613691 is 196316321.

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

It is a cyclic number.

It is not a de Polignac number, because 123613691 - 2² = 123613687 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (123613621) 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, 1437326 + ... + 1437411.

It is an arithmetic number, because the mean of its divisors is an integer number (31622118).

Almost surely, 2^123613691 is an apocalyptic number.

123613691 is a deficient number, since it is larger than the sum of its proper divisors (2874781).

123613691 is an equidigital number, since it uses as much as digits as its factorization.

123613691 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2874780.

The product of its digits is 5832, while the sum is 32.

The square root of 123613691 is about 11118.1694086752. The cubic root of 123613691 is about 498.1447123301.

The spelling of 123613691 in words is "one hundred twenty-three million, six hundred thirteen thousand, six hundred ninety-one".