123908 has 6 divisors (see below), whose sum is σ = 216846. Its totient is φ = 61952.

The previous prime is 123887. The next prime is 123911. The reversal of 123908 is 809321.

It can be written as a sum of positive squares in only one way, i.e., 123904 + 4 = 352^2 + 2^2 .

It is a congruent number.

It is an unprimeable number.

123908 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15485 + ... + 15492.

It is an arithmetic number, because the mean of its divisors is an integer number (36141).

2¹²³⁹⁰⁸ is an apocalyptic number.

It is an amenable number.

123908 is a deficient number, since it is larger than the sum of its proper divisors (92938).

123908 is a wasteful number, since it uses less digits than its factorization.

123908 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30981 (or 30979 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 23.

The square root of 123908 is about 352.0056817723. The cubic root of 123908 is about 49.8539739430.

The spelling of 123908 in words is "one hundred twenty-three thousand, nine hundred eight".