91830931983 has 32 divisors (see below), whose sum is σ = 157083870720. Its totient is φ = 51933830400.

The previous prime is 91830931981. The next prime is 91830931987. The reversal of 91830931983 is 38913903819.

91830931983 is a `hidden beast` number, since 9 + 18 + 309 + 319 + 8 + 3 = 666.

It is not a de Polignac number, because 91830931983 - 2¹ = 91830931981 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (91830931981) 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 31 ways as a sum of consecutive naturals, for example, 2486193 + ... + 2522858.

It is an arithmetic number, because the mean of its divisors is an integer number (4908870960).

Almost surely, 2^91830931983 is an apocalyptic number.

91830931983 is a deficient number, since it is larger than the sum of its proper divisors (65252938737).

91830931983 is a wasteful number, since it uses less digits than its factorization.

91830931983 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5009164 (or 5009158 counting only the distinct ones).

The product of its (nonzero) digits is 1259712, while the sum is 54.

The spelling of 91830931983 in words is "ninety-one billion, eight hundred thirty million, nine hundred thirty-one thousand, nine hundred eighty-three".