91534717 has 2 divisors, whose sum is σ = 91534718. Its totient is φ = 91534716.

The previous prime is 91534711. The next prime is 91534721. The reversal of 91534717 is 71743519.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 75446596 + 16088121 = 8686^2 + 4011^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-91534717 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 (91534711) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45767358 + 45767359.

It is an arithmetic number, because the mean of its divisors is an integer number (45767359).

Almost surely, 2^91534717 is an apocalyptic number.

It is an amenable number.

91534717 is a deficient number, since it is larger than the sum of its proper divisors (1).

91534717 is an equidigital number, since it uses as much as digits as its factorization.

91534717 is an odious number, because the sum of its binary digits is odd.

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

The square root of 91534717 is about 9567.3777494149. The cubic root of 91534717 is about 450.6734229985.

The spelling of 91534717 in words is "ninety-one million, five hundred thirty-four thousand, seven hundred seventeen".