91268579 has 2 divisors, whose sum is σ = 91268580. Its totient is φ = 91268578.

The previous prime is 91268479. The next prime is 91268587. The reversal of 91268579 is 97586219.

It is a strong prime.

It is an emirp because it is prime and its reverse (97586219) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-91268579 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (91268479) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45634289 + 45634290.

It is an arithmetic number, because the mean of its divisors is an integer number (45634290).

Almost surely, 2^91268579 is an apocalyptic number.

91268579 is a deficient number, since it is larger than the sum of its proper divisors (1).

91268579 is an equidigital number, since it uses as much as digits as its factorization.

91268579 is an evil number, because the sum of its binary digits is even.

The product of its digits is 272160, while the sum is 47.

The square root of 91268579 is about 9553.4590070822. The cubic root of 91268579 is about 450.2362200115.

The spelling of 91268579 in words is "ninety-one million, two hundred sixty-eight thousand, five hundred seventy-nine".