123613687 has 2 divisors, whose sum is σ = 123613688. Its totient is φ = 123613686.

The previous prime is 123613667. The next prime is 123613703. The reversal of 123613687 is 786316321.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-123613687 is a prime.

It is a super-2 number, since 2×123613687² = 30560687227467938, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (123613667) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61806843 + 61806844.

It is an arithmetic number, because the mean of its divisors is an integer number (61806844).

Almost surely, 2^123613687 is an apocalyptic number.

123613687 is a deficient number, since it is larger than the sum of its proper divisors (1).

123613687 is an equidigital number, since it uses as much as digits as its factorization.

123613687 is an evil number, because the sum of its binary digits is even.

The product of its digits is 36288, while the sum is 37.

The square root of 123613687 is about 11118.1692287894. The cubic root of 123613687 is about 498.1447069570.

The spelling of 123613687 in words is "one hundred twenty-three million, six hundred thirteen thousand, six hundred eighty-seven".