85686137 has 8 divisors (see below), whose sum is σ = 92005632. Its totient is φ = 79508800.

The previous prime is 85686127. The next prime is 85686149. The reversal of 85686137 is 73168658.

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 85686137 - 2⁴ = 85686121 is a prime.

It is a super-2 number, since 2×85686137² = 14684228147965538, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (85686127) 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 7 ways as a sum of consecutive naturals, for example, 34289 + ... + 36702.

It is an arithmetic number, because the mean of its divisors is an integer number (11500704).

Almost surely, 2^85686137 is an apocalyptic number.

It is an amenable number.

85686137 is a deficient number, since it is larger than the sum of its proper divisors (6319495).

85686137 is a wasteful number, since it uses less digits than its factorization.

85686137 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 71079.

The product of its digits is 241920, while the sum is 44.

The square root of 85686137 is about 9256.6806685766. The cubic root of 85686137 is about 440.8628677064.

The spelling of 85686137 in words is "eighty-five million, six hundred eighty-six thousand, one hundred thirty-seven".