91796897 has 2 divisors, whose sum is σ = 91796898. Its totient is φ = 91796896.

The previous prime is 91796893. The next prime is 91796899. The reversal of 91796897 is 79869719.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 85451536 + 6345361 = 9244^2 + 2519^2 .

It is an emirp because it is prime and its reverse (79869719) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 91796897 - 2² = 91796893 is a prime.

Together with 91796899, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (91796891) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45898448 + 45898449.

It is an arithmetic number, because the mean of its divisors is an integer number (45898449).

Almost surely, 2^91796897 is an apocalyptic number.

It is an amenable number.

91796897 is a deficient number, since it is larger than the sum of its proper divisors (1).

91796897 is an equidigital number, since it uses as much as digits as its factorization.

91796897 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1714608, while the sum is 56.

The square root of 91796897 is about 9581.0697210698. The cubic root of 91796897 is about 451.1032960544.

The spelling of 91796897 in words is "ninety-one million, seven hundred ninety-six thousand, eight hundred ninety-seven".