91533979 has 8 divisors (see below), whose sum is σ = 94688640. Its totient is φ = 88392000.

The previous prime is 91533961. The next prime is 91533991. The reversal of 91533979 is 97933519.

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

It is a cyclic number.

It is not a de Polignac number, because 91533979 - 2⁷ = 91533851 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (91533929) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12879 + ... + 18679.

It is an arithmetic number, because the mean of its divisors is an integer number (11836080).

Almost surely, 2^91533979 is an apocalyptic number.

91533979 is a deficient number, since it is larger than the sum of its proper divisors (3154661).

91533979 is a wasteful number, since it uses less digits than its factorization.

91533979 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6341.

The product of its digits is 229635, while the sum is 46.

The square root of 91533979 is about 9567.3391807754. The cubic root of 91533979 is about 450.6722118082.

The spelling of 91533979 in words is "ninety-one million, five hundred thirty-three thousand, nine hundred seventy-nine".