85684681 has 8 divisors (see below), whose sum is σ = 87816960. Its totient is φ = 83558832.

The previous prime is 85684657. The next prime is 85684721. The reversal of 85684681 is 18648658.

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

It is a cyclic number.

It is not a de Polignac number, because 85684681 - 2⁵ = 85684649 is a prime.

It is a super-2 number, since 2×85684681² = 14683729116143522, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (85684601) 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, 35955 + ... + 38263.

It is an arithmetic number, because the mean of its divisors is an integer number (10977120).

Almost surely, 2^85684681 is an apocalyptic number.

It is an amenable number.

85684681 is a deficient number, since it is larger than the sum of its proper divisors (2132279).

85684681 is a wasteful number, since it uses less digits than its factorization.

85684681 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3215.

The product of its digits is 368640, while the sum is 46.

The square root of 85684681 is about 9256.6020223406. The cubic root of 85684681 is about 440.8603706087.

The spelling of 85684681 in words is "eighty-five million, six hundred eighty-four thousand, six hundred eighty-one".