94091981931 has 12 divisors (see below), whose sum is σ = 135918617640. Its totient is φ = 62724306240.

The previous prime is 94091981857. The next prime is 94091981933. The reversal of 94091981931 is 13918919049.

94091981931 is a `hidden beast` number, since 9 + 409 + 198 + 19 + 31 = 666.

It is not a de Polignac number, because 94091981931 - 2¹⁷ = 94091850859 is a prime.

It is a super-2 number, since 2×94091981931² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (94091981933) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 140190 + ... + 455891.

It is an arithmetic number, because the mean of its divisors is an integer number (11326551470).

Almost surely, 2^94091981931 is an apocalyptic number.

94091981931 is a deficient number, since it is larger than the sum of its proper divisors (41826635709).

94091981931 is a wasteful number, since it uses less digits than its factorization.

94091981931 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 613626 (or 613623 counting only the distinct ones).

The product of its (nonzero) digits is 629856, while the sum is 54.

The spelling of 94091981931 in words is "ninety-four billion, ninety-one million, nine hundred eighty-one thousand, nine hundred thirty-one".