85631859 has 6 divisors (see below), whose sum is σ = 123690476. Its totient is φ = 57087900.

The previous prime is 85631851. The next prime is 85631957. The reversal of 85631859 is 95813658.

85631859 is a `hidden beast` number, since 8 + 5 + 631 + 8 + 5 + 9 = 666.

It is not a de Polignac number, because 85631859 - 2³ = 85631851 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (85631851) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 4757317 + ... + 4757334.

Almost surely, 2^85631859 is an apocalyptic number.

85631859 is a deficient number, since it is larger than the sum of its proper divisors (38058617).

85631859 is a wasteful number, since it uses less digits than its factorization.

85631859 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9514657 (or 9514654 counting only the distinct ones).

The product of its digits is 259200, while the sum is 45.

The square root of 85631859 is about 9253.7483756584. The cubic root of 85631859 is about 440.7697596495.

The spelling of 85631859 in words is "eighty-five million, six hundred thirty-one thousand, eight hundred fifty-nine".