85391613 has 12 divisors (see below), whose sum is σ = 123436768. Its totient is φ = 56884680.

The previous prime is 85391611. The next prime is 85391633. The reversal of 85391613 is 31619358.

It is a happy number.

85391613 is a `hidden beast` number, since 8 + 5 + 39 + 1 + 613 = 666.

It is not a de Polignac number, because 85391613 - 2¹ = 85391611 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 (85391611) 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 11 ways as a sum of consecutive naturals, for example, 13008 + ... + 18438.

Almost surely, 2^85391613 is an apocalyptic number.

It is an amenable number.

85391613 is a deficient number, since it is larger than the sum of its proper divisors (38045155).

85391613 is a wasteful number, since it uses less digits than its factorization.

85391613 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7184 (or 7181 counting only the distinct ones).

The product of its digits is 19440, while the sum is 36.

The square root of 85391613 is about 9240.7582481093. The cubic root of 85391613 is about 440.3571703876.

The spelling of 85391613 in words is "eighty-five million, three hundred ninety-one thousand, six hundred thirteen".