91598497 has 2 divisors, whose sum is σ = 91598498. Its totient is φ = 91598496.

The previous prime is 91598467. The next prime is 91598509. The reversal of 91598497 is 79489519.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 79495056 + 12103441 = 8916^2 + 3479^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-91598497 is a prime.

It is not a weakly prime, because it can be changed into another prime (91598407) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45799248 + 45799249.

It is an arithmetic number, because the mean of its divisors is an integer number (45799249).

Almost surely, 2^91598497 is an apocalyptic number.

It is an amenable number.

91598497 is a deficient number, since it is larger than the sum of its proper divisors (1).

91598497 is an equidigital number, since it uses as much as digits as its factorization.

91598497 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 91598497 is about 9570.7103707092. The cubic root of 91598497 is about 450.7780728273.

The spelling of 91598497 in words is "ninety-one million, five hundred ninety-eight thousand, four hundred ninety-seven".