91244717 has 2 divisors, whose sum is σ = 91244718. Its totient is φ = 91244716.

The previous prime is 91244677. The next prime is 91244723. The reversal of 91244717 is 71744219.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 83704201 + 7540516 = 9149^2 + 2746^2 .

It is a cyclic number.

It is not a de Polignac number, because 91244717 - 2⁶ = 91244653 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (91244767) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45622358 + 45622359.

It is an arithmetic number, because the mean of its divisors is an integer number (45622359).

Almost surely, 2^91244717 is an apocalyptic number.

It is an amenable number.

91244717 is a deficient number, since it is larger than the sum of its proper divisors (1).

91244717 is an equidigital number, since it uses as much as digits as its factorization.

91244717 is an evil number, because the sum of its binary digits is even.

The product of its digits is 14112, while the sum is 35.

The square root of 91244717 is about 9552.2100584106. The cubic root of 91244717 is about 450.1969787843.

The spelling of 91244717 in words is "ninety-one million, two hundred forty-four thousand, seven hundred seventeen".