931990906 has 32 divisors (see below), whose sum is σ = 1744364160. Its totient is φ = 362817600.

The previous prime is 931990903. The next prime is 931990919. The reversal of 931990906 is 609099139.

It is not an unprimeable number, because it can be changed into a prime (931990903) 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 15 ways as a sum of consecutive naturals, for example, 354276 + ... + 356896.

It is an arithmetic number, because the mean of its divisors is an integer number (54511380).

Almost surely, 2^931990906 is an apocalyptic number.

931990906 is a deficient number, since it is larger than the sum of its proper divisors (812373254).

931990906 is a wasteful number, since it uses less digits than its factorization.

931990906 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4950.

The product of its (nonzero) digits is 118098, while the sum is 46.

The square root of 931990906 is about 30528.5261026470. The cubic root of 931990906 is about 976.7960428942.

The spelling of 931990906 in words is "nine hundred thirty-one million, nine hundred ninety thousand, nine hundred six".