91745317 has 2 divisors, whose sum is σ = 91745318. Its totient is φ = 91745316.

The previous prime is 91745267. The next prime is 91745333. The reversal of 91745317 is 71354719.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 88472836 + 3272481 = 9406^2 + 1809^2 .

It is a cyclic number.

It is not a de Polignac number, because 91745317 - 2¹⁵ = 91712549 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (91745347) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45872658 + 45872659.

It is an arithmetic number, because the mean of its divisors is an integer number (45872659).

Almost surely, 2^91745317 is an apocalyptic number.

It is an amenable number.

91745317 is a deficient number, since it is larger than the sum of its proper divisors (1).

91745317 is an equidigital number, since it uses as much as digits as its factorization.

91745317 is an evil number, because the sum of its binary digits is even.

The product of its digits is 26460, while the sum is 37.

The square root of 91745317 is about 9578.3775766045. The cubic root of 91745317 is about 451.0187896853.

The spelling of 91745317 in words is "ninety-one million, seven hundred forty-five thousand, three hundred seventeen".