123391936 has 28 divisors (see below), whose sum is σ = 245406672. Its totient is φ = 61557248.

The previous prime is 123391903. The next prime is 123391949. The reversal of 123391936 is 639193321.

It is a Smith number, since the sum of its digits (37) coincides with the sum of the digits of its prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 123391895 and 123391904.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 30276 + ... + 34108.

It is an arithmetic number, because the mean of its divisors is an integer number (8764524).

Almost surely, 2^123391936 is an apocalyptic number.

123391936 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

123391936 is a deficient number, since it is larger than the sum of its proper divisors (122014736).

123391936 is an equidigital number, since it uses as much as digits as its factorization.

123391936 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4348 (or 4338 counting only the distinct ones).

The product of its digits is 26244, while the sum is 37.

The square root of 123391936 is about 11108.1922921779. The cubic root of 123391936 is about 497.8466541834.

The spelling of 123391936 in words is "one hundred twenty-three million, three hundred ninety-one thousand, nine hundred thirty-six".