91119689 has 4 divisors (see below), whose sum is σ = 91165200. Its totient is φ = 91074180.

The previous prime is 91119673. The next prime is 91119701. The reversal of 91119689 is 98691119.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 91119689 - 2⁴ = 91119673 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (91119089) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 19607 + ... + 23804.

It is an arithmetic number, because the mean of its divisors is an integer number (22791300).

Almost surely, 2^91119689 is an apocalyptic number.

It is an amenable number.

91119689 is a deficient number, since it is larger than the sum of its proper divisors (45511).

91119689 is a wasteful number, since it uses less digits than its factorization.

91119689 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45510.

The product of its digits is 34992, while the sum is 44.

The square root of 91119689 is about 9545.6633609194. The cubic root of 91119689 is about 449.9912574433.

The spelling of 91119689 in words is "ninety-one million, one hundred nineteen thousand, six hundred eighty-nine".