91354979 has 2 divisors, whose sum is σ = 91354980. Its totient is φ = 91354978.

The previous prime is 91354973. The next prime is 91354999. The reversal of 91354979 is 97945319.

It is a weak prime.

It is an emirp because it is prime and its reverse (97945319) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-91354979 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (91354973) 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, 45677489 + 45677490.

It is an arithmetic number, because the mean of its divisors is an integer number (45677490).

Almost surely, 2^91354979 is an apocalyptic number.

91354979 is a deficient number, since it is larger than the sum of its proper divisors (1).

91354979 is an equidigital number, since it uses as much as digits as its factorization.

91354979 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 306180, while the sum is 47.

The square root of 91354979 is about 9557.9798597821. The cubic root of 91354979 is about 450.3782482289.

The spelling of 91354979 in words is "ninety-one million, three hundred fifty-four thousand, nine hundred seventy-nine".