91579751 has 2 divisors, whose sum is σ = 91579752. Its totient is φ = 91579750.

The previous prime is 91579739. The next prime is 91579771. The reversal of 91579751 is 15797519.

It is a weak prime.

It is an emirp because it is prime and its reverse (15797519) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 91579751 - 2²² = 87385447 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 (91579711) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45789875 + 45789876.

It is an arithmetic number, because the mean of its divisors is an integer number (45789876).

Almost surely, 2^91579751 is an apocalyptic number.

91579751 is a deficient number, since it is larger than the sum of its proper divisors (1).

91579751 is an equidigital number, since it uses as much as digits as its factorization.

91579751 is an evil number, because the sum of its binary digits is even.

The product of its digits is 99225, while the sum is 44.

The square root of 91579751 is about 9569.7309784549. The cubic root of 91579751 is about 450.7473195487.

The spelling of 91579751 in words is "ninety-one million, five hundred seventy-nine thousand, seven hundred fifty-one".