91432662631 has 2 divisors, whose sum is σ = 91432662632. Its totient is φ = 91432662630.

The previous prime is 91432662583. The next prime is 91432662653. The reversal of 91432662631 is 13626623419.

It is a strong prime.

It is an emirp because it is prime and its reverse (13626623419) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-91432662631 is a prime.

It is a super-2 number, since 2×91432662631² (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 (91432662131) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45716331315 + 45716331316.

It is an arithmetic number, because the mean of its divisors is an integer number (45716331316).

Almost surely, 2^91432662631 is an apocalyptic number.

91432662631 is a deficient number, since it is larger than the sum of its proper divisors (1).

91432662631 is an equidigital number, since it uses as much as digits as its factorization.

91432662631 is an evil number, because the sum of its binary digits is even.

The product of its digits is 279936, while the sum is 43.

The spelling of 91432662631 in words is "ninety-one billion, four hundred thirty-two million, six hundred sixty-two thousand, six hundred thirty-one".