91324579 has 2 divisors, whose sum is σ = 91324580. Its totient is φ = 91324578.

The previous prime is 91324577. The next prime is 91324603. The reversal of 91324579 is 97542319.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 91324579 - 2¹ = 91324577 is a prime.

Together with 91324577, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (91324577) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45662289 + 45662290.

It is an arithmetic number, because the mean of its divisors is an integer number (45662290).

Almost surely, 2^91324579 is an apocalyptic number.

91324579 is a deficient number, since it is larger than the sum of its proper divisors (1).

91324579 is an equidigital number, since it uses as much as digits as its factorization.

91324579 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 68040, while the sum is 40.

The square root of 91324579 is about 9556.3894332535. The cubic root of 91324579 is about 450.3282855526.

The spelling of 91324579 in words is "ninety-one million, three hundred twenty-four thousand, five hundred seventy-nine".