91495997 has 2 divisors, whose sum is σ = 91495998. Its totient is φ = 91495996.

The previous prime is 91495993. The next prime is 91496011. The reversal of 91495997 is 79959419.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 81830116 + 9665881 = 9046^2 + 3109^2 .

It is a cyclic number.

It is not a de Polignac number, because 91495997 - 2² = 91495993 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (91495991) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45747998 + 45747999.

It is an arithmetic number, because the mean of its divisors is an integer number (45747999).

Almost surely, 2^91495997 is an apocalyptic number.

It is an amenable number.

91495997 is a deficient number, since it is larger than the sum of its proper divisors (1).

91495997 is an equidigital number, since it uses as much as digits as its factorization.

91495997 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 918540, while the sum is 53.

The square root of 91495997 is about 9565.3539924040. The cubic root of 91495997 is about 450.6098677464.

The spelling of 91495997 in words is "ninety-one million, four hundred ninety-five thousand, nine hundred ninety-seven".