91044497 has 2 divisors, whose sum is σ = 91044498. Its totient is φ = 91044496.

The previous prime is 91044487. The next prime is 91044521. The reversal of 91044497 is 79444019.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 80442961 + 10601536 = 8969^2 + 3256^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-91044497 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 91044497.

It is not a weakly prime, because it can be changed into another prime (91044467) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45522248 + 45522249.

It is an arithmetic number, because the mean of its divisors is an integer number (45522249).

Almost surely, 2^91044497 is an apocalyptic number.

It is an amenable number.

91044497 is a deficient number, since it is larger than the sum of its proper divisors (1).

91044497 is an equidigital number, since it uses as much as digits as its factorization.

91044497 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 36288, while the sum is 38.

The square root of 91044497 is about 9541.7240056501. The cubic root of 91044497 is about 449.8674457316.

The spelling of 91044497 in words is "ninety-one million, forty-four thousand, four hundred ninety-seven".