85693391 has 4 divisors (see below), whose sum is σ = 97935312. Its totient is φ = 73451472.

The previous prime is 85693373. The next prime is 85693397. The reversal of 85693391 is 19339658.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-85693391 is a prime.

It is a super-2 number, since 2×85693391² = 14686714522157762, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (85693397) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6120950 + ... + 6120963.

It is an arithmetic number, because the mean of its divisors is an integer number (24483828).

Almost surely, 2^85693391 is an apocalyptic number.

85693391 is a deficient number, since it is larger than the sum of its proper divisors (12241921).

85693391 is a wasteful number, since it uses less digits than its factorization.

85693391 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12241920.

The product of its digits is 174960, while the sum is 44.

The square root of 85693391 is about 9257.0724854027. The cubic root of 85693391 is about 440.8753081824.

The spelling of 85693391 in words is "eighty-five million, six hundred ninety-three thousand, three hundred ninety-one".