91108679 has 2 divisors, whose sum is σ = 91108680. Its totient is φ = 91108678.

The previous prime is 91108663. The next prime is 91108711. The reversal of 91108679 is 97680119.

It is a happy number.

It is a weak prime.

It is an emirp because it is prime and its reverse (97680119) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 91108679 - 2⁴ = 91108663 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (91108609) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45554339 + 45554340.

It is an arithmetic number, because the mean of its divisors is an integer number (45554340).

Almost surely, 2^91108679 is an apocalyptic number.

91108679 is a deficient number, since it is larger than the sum of its proper divisors (1).

91108679 is an equidigital number, since it uses as much as digits as its factorization.

91108679 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 27216, while the sum is 41.

The square root of 91108679 is about 9545.0866418278. The cubic root of 91108679 is about 449.9731325523.

The spelling of 91108679 in words is "ninety-one million, one hundred eight thousand, six hundred seventy-nine".