123993992 has 16 divisors (see below), whose sum is σ = 232734300. Its totient is φ = 61931520.

The previous prime is 123993973. The next prime is 123993997. The reversal of 123993992 is 299399321.

It can be written as a sum of positive squares in 2 ways, for example, as 123787876 + 206116 = 11126^2 + 454^2 .

It is not an unprimeable number, because it can be changed into a prime (123993997) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 392 + ... + 15752.

Almost surely, 2^123993992 is an apocalyptic number.

It is an amenable number.

123993992 is a deficient number, since it is larger than the sum of its proper divisors (108740308).

123993992 is a wasteful number, since it uses less digits than its factorization.

123993992 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16376 (or 16372 counting only the distinct ones).

The product of its digits is 236196, while the sum is 47.

The square root of 123993992 is about 11135.2589552287. The cubic root of 123993992 is about 498.6550414167.

The spelling of 123993992 in words is "one hundred twenty-three million, nine hundred ninety-three thousand, nine hundred ninety-two".