91980089 has 8 divisors (see below), whose sum is σ = 93078720. Its totient is φ = 90886096.

The previous prime is 91980071. The next prime is 91980127. The reversal of 91980089 is 98008919.

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 91980089 - 2²⁰ = 90931513 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (91980029) 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, 52967 + ... + 54675.

It is an arithmetic number, because the mean of its divisors is an integer number (11634840).

Almost surely, 2^91980089 is an apocalyptic number.

It is an amenable number.

91980089 is a deficient number, since it is larger than the sum of its proper divisors (1098631).

91980089 is a wasteful number, since it uses less digits than its factorization.

91980089 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2319.

The product of its (nonzero) digits is 46656, while the sum is 44.

The square root of 91980089 is about 9590.6250578364. The cubic root of 91980089 is about 451.4031740343.

The spelling of 91980089 in words is "ninety-one million, nine hundred eighty thousand, eighty-nine".