123731964 has 36 divisors (see below), whose sum is σ = 313434576. Its totient is φ = 41155968.

The previous prime is 123731963. The next prime is 123731977. The reversal of 123731964 is 469137321.

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123731963) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 14692 + ... + 21524.

It is an arithmetic number, because the mean of its divisors is an integer number (8706516).

Almost surely, 2^123731964 is an apocalyptic number.

It is an amenable number.

123731964 is an abundant number, since it is smaller than the sum of its proper divisors (189702612).

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

123731964 is a wasteful number, since it uses less digits than its factorization.

123731964 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7346 (or 7341 counting only the distinct ones).

The product of its digits is 27216, while the sum is 36.

The square root of 123731964 is about 11123.4870431893. The cubic root of 123731964 is about 498.3035358621.

The spelling of 123731964 in words is "one hundred twenty-three million, seven hundred thirty-one thousand, nine hundred sixty-four".