91012297 has 2 divisors, whose sum is σ = 91012298. Its totient is φ = 91012296.

The previous prime is 91012291. The next prime is 91012307. The reversal of 91012297 is 79221019.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 86564416 + 4447881 = 9304^2 + 2109^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-91012297 is a prime.

It is not a weakly prime, because it can be changed into another prime (91012291) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45506148 + 45506149.

It is an arithmetic number, because the mean of its divisors is an integer number (45506149).

Almost surely, 2^91012297 is an apocalyptic number.

It is an amenable number.

91012297 is a deficient number, since it is larger than the sum of its proper divisors (1).

91012297 is an equidigital number, since it uses as much as digits as its factorization.

91012297 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2268, while the sum is 31.

The square root of 91012297 is about 9540.0365303284. The cubic root of 91012297 is about 449.8144041227.

The spelling of 91012297 in words is "ninety-one million, twelve thousand, two hundred ninety-seven".