91745417 has 2 divisors, whose sum is σ = 91745418. Its totient is φ = 91745416.

The previous prime is 91745411. The next prime is 91745431. The reversal of 91745417 is 71454719.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 91604041 + 141376 = 9571^2 + 376^2 .

It is a cyclic number.

It is not a de Polignac number, because 91745417 - 2⁸ = 91745161 is a prime.

It is not a weakly prime, because it can be changed into another prime (91745411) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45872708 + 45872709.

It is an arithmetic number, because the mean of its divisors is an integer number (45872709).

Almost surely, 2^91745417 is an apocalyptic number.

It is an amenable number.

91745417 is a deficient number, since it is larger than the sum of its proper divisors (1).

91745417 is an equidigital number, since it uses as much as digits as its factorization.

91745417 is an evil number, because the sum of its binary digits is even.

The product of its digits is 35280, while the sum is 38.

The square root of 91745417 is about 9578.3827966938. The cubic root of 91745417 is about 451.0189535514.

The spelling of 91745417 in words is "ninety-one million, seven hundred forty-five thousand, four hundred seventeen".