91929191983 has 2 divisors, whose sum is σ = 91929191984. Its totient is φ = 91929191982.

The previous prime is 91929191873. The next prime is 91929192029. The reversal of 91929191983 is 38919192919.

It is a strong prime.

It is an emirp because it is prime and its reverse (38919192919) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 91929191983 - 2²⁵ = 91895637551 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (91929198983) 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 as a sum of consecutive naturals, namely, 45964595991 + 45964595992.

It is an arithmetic number, because the mean of its divisors is an integer number (45964595992).

Almost surely, 2^91929191983 is an apocalyptic number.

91929191983 is a deficient number, since it is larger than the sum of its proper divisors (1).

91929191983 is an equidigital number, since it uses as much as digits as its factorization.

91929191983 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2834352, while the sum is 61.

The spelling of 91929191983 in words is "ninety-one billion, nine hundred twenty-nine million, one hundred ninety-one thousand, nine hundred eighty-three".