931999042 has 16 divisors (see below), whose sum is σ = 1557453240. Its totient is φ = 415320192.

The previous prime is 931999021. The next prime is 931999063. The reversal of 931999042 is 240999139.

931999042 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (931999021) and next prime (931999063).

It can be written as a sum of positive squares in 4 ways, for example, as 598242681 + 333756361 = 24459^2 + 18269^2 .

It is a junction number, because it is equal to n+sod(n) for n = 931998983 and 931999001.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 617283 + ... + 618790.

Almost surely, 2^931999042 is an apocalyptic number.

931999042 is a deficient number, since it is larger than the sum of its proper divisors (625454198).

931999042 is a wasteful number, since it uses less digits than its factorization.

931999042 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1236117.

The product of its (nonzero) digits is 157464, while the sum is 46.

The square root of 931999042 is about 30528.6593547768. The cubic root of 931999042 is about 976.7988852644.

The spelling of 931999042 in words is "nine hundred thirty-one million, nine hundred ninety-nine thousand, forty-two".