91679961 has 8 divisors (see below), whose sum is σ = 122290144. Its totient is φ = 61094880.

The previous prime is 91679947. The next prime is 91679971. The reversal of 91679961 is 16997619.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 91679961 - 2¹¹ = 91677913 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 91679961.

It is not an unprimeable number, because it can be changed into a prime (91679971) 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 7 ways as a sum of consecutive naturals, for example, 5301 + ... + 14541.

It is an arithmetic number, because the mean of its divisors is an integer number (15286268).

Almost surely, 2^91679961 is an apocalyptic number.

It is an amenable number.

91679961 is a deficient number, since it is larger than the sum of its proper divisors (30610183).

91679961 is a wasteful number, since it uses less digits than its factorization.

91679961 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12551.

The product of its digits is 183708, while the sum is 48.

The square root of 91679961 is about 9574.9653263080. The cubic root of 91679961 is about 450.9116678283.

The spelling of 91679961 in words is "ninety-one million, six hundred seventy-nine thousand, nine hundred sixty-one".