91923679 has 4 divisors (see below), whose sum is σ = 91971576. Its totient is φ = 91875784.

The previous prime is 91923673. The next prime is 91923683. The reversal of 91923679 is 97632919.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 91923679 - 2¹⁷ = 91792607 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (91923673) 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 in 3 ways as a sum of consecutive naturals, for example, 20944 + ... + 24949.

It is an arithmetic number, because the mean of its divisors is an integer number (22992894).

Almost surely, 2^91923679 is an apocalyptic number.

91923679 is a deficient number, since it is larger than the sum of its proper divisors (47897).

91923679 is a wasteful number, since it uses less digits than its factorization.

91923679 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 47896.

The product of its digits is 183708, while the sum is 46.

The square root of 91923679 is about 9587.6837140156. The cubic root of 91923679 is about 451.3108755793.

The spelling of 91923679 in words is "ninety-one million, nine hundred twenty-three thousand, six hundred seventy-nine".