91766879 has 2 divisors, whose sum is σ = 91766880. Its totient is φ = 91766878.

The previous prime is 91766869. The next prime is 91766893. The reversal of 91766879 is 97866719.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-91766879 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 91766879.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (91766809) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45883439 + 45883440.

It is an arithmetic number, because the mean of its divisors is an integer number (45883440).

Almost surely, 2^91766879 is an apocalyptic number.

91766879 is a deficient number, since it is larger than the sum of its proper divisors (1).

91766879 is an equidigital number, since it uses as much as digits as its factorization.

91766879 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1143072, while the sum is 53.

The square root of 91766879 is about 9579.5030664435. The cubic root of 91766879 is about 451.0541197552.

The spelling of 91766879 in words is "ninety-one million, seven hundred sixty-six thousand, eight hundred seventy-nine".