91679803771 has 2 divisors, whose sum is σ = 91679803772. Its totient is φ = 91679803770.

The previous prime is 91679803769. The next prime is 91679803801. The reversal of 91679803771 is 17730897619.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 91679803771 - 2¹ = 91679803769 is a prime.

Together with 91679803769, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (91679803741) 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, 45839901885 + 45839901886.

It is an arithmetic number, because the mean of its divisors is an integer number (45839901886).

Almost surely, 2^91679803771 is an apocalyptic number.

91679803771 is a deficient number, since it is larger than the sum of its proper divisors (1).

91679803771 is an equidigital number, since it uses as much as digits as its factorization.

91679803771 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4000752, while the sum is 58.

The spelling of 91679803771 in words is "ninety-one billion, six hundred seventy-nine million, eight hundred three thousand, seven hundred seventy-one".