91119389 has 4 divisors (see below), whose sum is σ = 91521024. Its totient is φ = 90717756.

The previous prime is 91119377. The next prime is 91119401. The reversal of 91119389 is 98391119.

It is a happy number.

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 an interprime number because it is at equal distance from previous prime (91119377) and next prime (91119401).

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-91119389 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (91119319) 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 3 ways as a sum of consecutive naturals, for example, 200477 + ... + 200930.

It is an arithmetic number, because the mean of its divisors is an integer number (22880256).

Almost surely, 2^91119389 is an apocalyptic number.

It is an amenable number.

91119389 is a deficient number, since it is larger than the sum of its proper divisors (401635).

91119389 is a wasteful number, since it uses less digits than its factorization.

91119389 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 401634.

The product of its digits is 17496, while the sum is 41.

The square root of 91119389 is about 9545.6476469646. The cubic root of 91119389 is about 449.9907635964.

The spelling of 91119389 in words is "ninety-one million, one hundred nineteen thousand, three hundred eighty-nine".