85165613 has 8 divisors (see below), whose sum is σ = 92748600. Its totient is φ = 77730048.

The previous prime is 85165607. The next prime is 85165621. The reversal of 85165613 is 31656158.

It can be written as a sum of positive squares in 4 ways, for example, as 7496644 + 77668969 = 2738^2 + 8813^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-85165613 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 (85165603) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 35648 + ... + 37961.

It is an arithmetic number, because the mean of its divisors is an integer number (11593575).

Almost surely, 2^85165613 is an apocalyptic number.

It is an amenable number.

85165613 is a deficient number, since it is larger than the sum of its proper divisors (7582987).

85165613 is a wasteful number, since it uses less digits than its factorization.

85165613 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 73711.

The product of its digits is 21600, while the sum is 35.

The square root of 85165613 is about 9228.5217126038. The cubic root of 85165613 is about 439.9683396641.

The spelling of 85165613 in words is "eighty-five million, one hundred sixty-five thousand, six hundred thirteen".