91214597 has 2 divisors, whose sum is σ = 91214598. Its totient is φ = 91214596.

The previous prime is 91214561. The next prime is 91214659. The reversal of 91214597 is 79541219.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 86694721 + 4519876 = 9311^2 + 2126^2 .

It is a cyclic number.

It is not a de Polignac number, because 91214597 - 2⁸ = 91214341 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 91214597.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (91214507) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45607298 + 45607299.

It is an arithmetic number, because the mean of its divisors is an integer number (45607299).

Almost surely, 2^91214597 is an apocalyptic number.

It is an amenable number.

91214597 is a deficient number, since it is larger than the sum of its proper divisors (1).

91214597 is an equidigital number, since it uses as much as digits as its factorization.

91214597 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 22680, while the sum is 38.

The square root of 91214597 is about 9550.6333297850. The cubic root of 91214597 is about 450.1474364628.

The spelling of 91214597 in words is "ninety-one million, two hundred fourteen thousand, five hundred ninety-seven".