91001297 has 2 divisors, whose sum is σ = 91001298. Its totient is φ = 91001296.

The previous prime is 91001269. The next prime is 91001321. The reversal of 91001297 is 79210019.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 77281681 + 13719616 = 8791^2 + 3704^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-91001297 is a prime.

It is a Chen prime.

It is equal to p_5271725 and since 91001297 and 5271725 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (91001227) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45500648 + 45500649.

It is an arithmetic number, because the mean of its divisors is an integer number (45500649).

Almost surely, 2^91001297 is an apocalyptic number.

It is an amenable number.

91001297 is a deficient number, since it is larger than the sum of its proper divisors (1).

91001297 is an equidigital number, since it uses as much as digits as its factorization.

91001297 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1134, while the sum is 29.

The square root of 91001297 is about 9539.4599951989. The cubic root of 91001297 is about 449.7962814515.

The spelling of 91001297 in words is "ninety-one million, one thousand, two hundred ninety-seven".