86854581 has 24 divisors (see below), whose sum is σ = 144915264. Its totient is φ = 49541760.

The previous prime is 86854499. The next prime is 86854589. The reversal of 86854581 is 18545868.

86854581 is a `hidden beast` number, since 8 + 68 + 5 + 4 + 581 = 666.

It is not a de Polignac number, because 86854581 - 2¹⁸ = 86592437 is a prime.

It is a super-2 number, since 2×86854581² = 15087436481371122, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (86854589) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 24121 + ... + 27486.

It is an arithmetic number, because the mean of its divisors is an integer number (6038136).

Almost surely, 2^86854581 is an apocalyptic number.

It is an amenable number.

86854581 is a deficient number, since it is larger than the sum of its proper divisors (58060683).

86854581 is a wasteful number, since it uses less digits than its factorization.

86854581 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51641 (or 51638 counting only the distinct ones).

The product of its digits is 307200, while the sum is 45.

The square root of 86854581 is about 9319.5805163108. The cubic root of 86854581 is about 442.8577438325.

The spelling of 86854581 in words is "eighty-six million, eight hundred fifty-four thousand, five hundred eighty-one".