89391613 has 4 divisors (see below), whose sum is σ = 89480188. Its totient is φ = 89303040.

The previous prime is 89391587. The next prime is 89391623. The reversal of 89391613 is 31619398.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 61121124 + 28270489 = 7818^2 + 5317^2 .

It is a cyclic number.

It is not a de Polignac number, because 89391613 - 2¹³ = 89383421 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (89391623) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 42756 + ... + 44797.

It is an arithmetic number, because the mean of its divisors is an integer number (22370047).

Almost surely, 2^89391613 is an apocalyptic number.

It is an amenable number.

89391613 is a deficient number, since it is larger than the sum of its proper divisors (88575).

89391613 is a wasteful number, since it uses less digits than its factorization.

89391613 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 88574.

The product of its digits is 34992, while the sum is 40.

The square root of 89391613 is about 9454.7137978894. The cubic root of 89391613 is about 447.1284024386.

The spelling of 89391613 in words is "eighty-nine million, three hundred ninety-one thousand, six hundred thirteen".