123912904 has 8 divisors (see below), whose sum is σ = 232336710. Its totient is φ = 61956448.

The previous prime is 123912871. The next prime is 123912907. The reversal of 123912904 is 409219321.

It can be written as a sum of positive squares in only one way, i.e., 95844100 + 28068804 = 9790^2 + 5298^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is not an unprimeable number, because it can be changed into a prime (123912907) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7744549 + ... + 7744564.

Almost surely, 2^123912904 is an apocalyptic number.

It is an amenable number.

123912904 is a deficient number, since it is larger than the sum of its proper divisors (108423806).

123912904 is a wasteful number, since it uses less digits than its factorization.

123912904 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15489119 (or 15489115 counting only the distinct ones).

The product of its (nonzero) digits is 3888, while the sum is 31.

The square root of 123912904 is about 11131.6173128616. The cubic root of 123912904 is about 498.5463163704.

The spelling of 123912904 in words is "one hundred twenty-three million, nine hundred twelve thousand, nine hundred four".