123936975 has 18 divisors (see below), whose sum is σ = 221985296. Its totient is φ = 66099600.

The previous prime is 123936971. The next prime is 123936983. The reversal of 123936975 is 579639321.

It is not a de Polignac number, because 123936975 - 2² = 123936971 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

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 123936975.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123936971) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 275191 + ... + 275640.

Almost surely, 2^123936975 is an apocalyptic number.

123936975 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

123936975 is a deficient number, since it is larger than the sum of its proper divisors (98048321).

123936975 is a wasteful number, since it uses less digits than its factorization.

123936975 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 550847 (or 550839 counting only the distinct ones).

The product of its digits is 306180, while the sum is 45.

The square root of 123936975 is about 11132.6984599422. The cubic root of 123936975 is about 498.5785963859.

The spelling of 123936975 in words is "one hundred twenty-three million, nine hundred thirty-six thousand, nine hundred seventy-five".