85291613 has 8 divisors (see below), whose sum is σ = 97091136. Its totient is φ = 74166400.

The previous prime is 85291607. The next prime is 85291621. The reversal of 85291613 is 31619258.

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

It is not a de Polignac number, because 85291613 - 2²² = 81097309 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 (85291643) 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, 168308 + ... + 168813.

It is an arithmetic number, because the mean of its divisors is an integer number (12136392).

Almost surely, 2^85291613 is an apocalyptic number.

85291613 is the 4937-th centered heptagonal number.

It is an amenable number.

85291613 is a deficient number, since it is larger than the sum of its proper divisors (11799523).

85291613 is a wasteful number, since it uses less digits than its factorization.

85291613 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 337155.

The product of its digits is 12960, while the sum is 35.

The square root of 85291613 is about 9235.3458516723. The cubic root of 85291613 is about 440.1852061225.

The spelling of 85291613 in words is "eighty-five million, two hundred ninety-one thousand, six hundred thirteen".