91516757 has 2 divisors, whose sum is σ = 91516758. Its totient is φ = 91516756.

The previous prime is 91516741. The next prime is 91516801. The reversal of 91516757 is 75761519.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 85396081 + 6120676 = 9241^2 + 2474^2 .

It is an emirp because it is prime and its reverse (75761519) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 91516757 - 2⁴ = 91516741 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 (91516157) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45758378 + 45758379.

It is an arithmetic number, because the mean of its divisors is an integer number (45758379).

Almost surely, 2^91516757 is an apocalyptic number.

It is an amenable number.

91516757 is a deficient number, since it is larger than the sum of its proper divisors (1).

91516757 is an equidigital number, since it uses as much as digits as its factorization.

91516757 is an evil number, because the sum of its binary digits is even.

The product of its digits is 66150, while the sum is 41.

The square root of 91516757 is about 9566.4390971772. The cubic root of 91516757 is about 450.6439455704.

The spelling of 91516757 in words is "ninety-one million, five hundred sixteen thousand, seven hundred fifty-seven".