91680119 has 4 divisors (see below), whose sum is σ = 91799496. Its totient is φ = 91560744.

The previous prime is 91680109. The next prime is 91680131. The reversal of 91680119 is 91108619.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 91108619 = 7 ⋅13015517.

It is a cyclic number.

It is not a de Polignac number, because 91680119 - 2¹² = 91676023 is a prime.

It is a super-2 number, since 2×91680119² = 16810488439708322, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (91680109) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 58529 + ... + 60074.

It is an arithmetic number, because the mean of its divisors is an integer number (22949874).

Almost surely, 2^91680119 is an apocalyptic number.

91680119 is a deficient number, since it is larger than the sum of its proper divisors (119377).

91680119 is a wasteful number, since it uses less digits than its factorization.

91680119 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 119376.

The product of its (nonzero) digits is 3888, while the sum is 35.

The square root of 91680119 is about 9574.9735769870. The cubic root of 91680119 is about 450.9119268598.

The spelling of 91680119 in words is "ninety-one million, six hundred eighty thousand, one hundred nineteen".