91902882991 has 2 divisors, whose sum is σ = 91902882992. Its totient is φ = 91902882990.

The previous prime is 91902882977. The next prime is 91902883021. The reversal of 91902882991 is 19928820919.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 91902882991 - 2¹⁹ = 91902358703 is a prime.

It is a super-2 number, since 2×91902882991² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (91902882791) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45951441495 + 45951441496.

It is an arithmetic number, because the mean of its divisors is an integer number (45951441496).

Almost surely, 2^91902882991 is an apocalyptic number.

91902882991 is a deficient number, since it is larger than the sum of its proper divisors (1).

91902882991 is an equidigital number, since it uses as much as digits as its factorization.

91902882991 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1679616, while the sum is 58.

The spelling of 91902882991 in words is "ninety-one billion, nine hundred two million, eight hundred eighty-two thousand, nine hundred ninety-one".