91448597 has 2 divisors, whose sum is σ = 91448598. Its totient is φ = 91448596.

The previous prime is 91448579. The next prime is 91448647. The reversal of 91448597 is 79584419.

Together with previous prime (91448579) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 90744676 + 703921 = 9526^2 + 839^2 .

It is a cyclic number.

It is not a de Polignac number, because 91448597 - 2²⁰ = 90400021 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (91448537) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45724298 + 45724299.

It is an arithmetic number, because the mean of its divisors is an integer number (45724299).

Almost surely, 2^91448597 is an apocalyptic number.

It is an amenable number.

91448597 is a deficient number, since it is larger than the sum of its proper divisors (1).

91448597 is an equidigital number, since it uses as much as digits as its factorization.

91448597 is an evil number, because the sum of its binary digits is even.

The product of its digits is 362880, while the sum is 47.

The square root of 91448597 is about 9562.8759795367. The cubic root of 91448597 is about 450.5320406725.

The spelling of 91448597 in words is "ninety-one million, four hundred forty-eight thousand, five hundred ninety-seven".