123311972 has 24 divisors (see below), whose sum is σ = 253291584. Its totient is φ = 51419232.

The previous prime is 123311939. The next prime is 123311977. The reversal of 123311972 is 279113321.

It is not an unprimeable number, because it can be changed into a prime (123311977) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 58478 + ... + 60549.

It is an arithmetic number, because the mean of its divisors is an integer number (10553816).

Almost surely, 2^123311972 is an apocalyptic number.

It is an amenable number.

123311972 is an abundant number, since it is smaller than the sum of its proper divisors (129979612).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

123311972 is a wasteful number, since it uses less digits than its factorization.

123311972 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 119075 (or 119073 counting only the distinct ones).

The product of its digits is 2268, while the sum is 29.

The square root of 123311972 is about 11104.5923833340. The cubic root of 123311972 is about 497.7390879631.

The spelling of 123311972 in words is "one hundred twenty-three million, three hundred eleven thousand, nine hundred seventy-two".