91422637 has 2 divisors, whose sum is σ = 91422638. Its totient is φ = 91422636.

The previous prime is 91422613. The next prime is 91422659. The reversal of 91422637 is 73622419.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 76282756 + 15139881 = 8734^2 + 3891^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-91422637 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (91422607) 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, 45711318 + 45711319.

It is an arithmetic number, because the mean of its divisors is an integer number (45711319).

Almost surely, 2^91422637 is an apocalyptic number.

It is an amenable number.

91422637 is a deficient number, since it is larger than the sum of its proper divisors (1).

91422637 is an equidigital number, since it uses as much as digits as its factorization.

91422637 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 18144, while the sum is 34.

The square root of 91422637 is about 9561.5185509416. The cubic root of 91422637 is about 450.4894049950.

The spelling of 91422637 in words is "ninety-one million, four hundred twenty-two thousand, six hundred thirty-seven".