91164379 has 2 divisors, whose sum is σ = 91164380. Its totient is φ = 91164378.

The previous prime is 91164347. The next prime is 91164389. The reversal of 91164379 is 97346119.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 91164379 - 2⁵ = 91164347 is a prime.

It is not a weakly prime, because it can be changed into another prime (91164329) 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, 45582189 + 45582190.

It is an arithmetic number, because the mean of its divisors is an integer number (45582190).

Almost surely, 2^91164379 is an apocalyptic number.

91164379 is a deficient number, since it is larger than the sum of its proper divisors (1).

91164379 is an equidigital number, since it uses as much as digits as its factorization.

91164379 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 40824, while the sum is 40.

The square root of 91164379 is about 9548.0039275233. The cubic root of 91164379 is about 450.0648120641.

The spelling of 91164379 in words is "ninety-one million, one hundred sixty-four thousand, three hundred seventy-nine".