85808691 has 12 divisors (see below), whose sum is σ = 125174400. Its totient is φ = 56638800.

The previous prime is 85808687. The next prime is 85808711. The reversal of 85808691 is 19680858.

85808691 is a `hidden beast` number, since 8 + 580 + 8 + 69 + 1 = 666.

It is not a de Polignac number, because 85808691 - 2² = 85808687 is a prime.

It is a super-2 number, since 2×85808691² = 14726262902266962, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (85808621) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 46291 + ... + 48108.

It is an arithmetic number, because the mean of its divisors is an integer number (10431200).

Almost surely, 2^85808691 is an apocalyptic number.

85808691 is a deficient number, since it is larger than the sum of its proper divisors (39365709).

85808691 is a wasteful number, since it uses less digits than its factorization.

85808691 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 94506 (or 94503 counting only the distinct ones).

The product of its (nonzero) digits is 138240, while the sum is 45.

The square root of 85808691 is about 9263.2980627852. The cubic root of 85808691 is about 441.0729513573.

It can be divided in two parts, 8580 and 8691, that added together give a palindrome (17271).

The spelling of 85808691 in words is "eighty-five million, eight hundred eight thousand, six hundred ninety-one".