91895497 has 2 divisors, whose sum is σ = 91895498. Its totient is φ = 91895496.

The previous prime is 91895491. The next prime is 91895527. The reversal of 91895497 is 79459819.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 61214976 + 30680521 = 7824^2 + 5539^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-91895497 is a prime.

It is not a weakly prime, because it can be changed into another prime (91895491) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45947748 + 45947749.

It is an arithmetic number, because the mean of its divisors is an integer number (45947749).

Almost surely, 2^91895497 is an apocalyptic number.

It is an amenable number.

91895497 is a deficient number, since it is larger than the sum of its proper divisors (1).

91895497 is an equidigital number, since it uses as much as digits as its factorization.

91895497 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 816480, while the sum is 52.

The square root of 91895497 is about 9586.2139033093. The cubic root of 91895497 is about 451.2647498395.

The spelling of 91895497 in words is "ninety-one million, eight hundred ninety-five thousand, four hundred ninety-seven".