86331861 has 24 divisors (see below), whose sum is σ = 155473344. Its totient is φ = 44847360.

The previous prime is 86331853. The next prime is 86331863. The reversal of 86331861 is 16813368.

86331861 is a `hidden beast` number, since 8 + 633 + 18 + 6 + 1 = 666.

It is not a de Polignac number, because 86331861 - 2³ = 86331853 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (86331863) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 61596 + ... + 62981.

It is an arithmetic number, because the mean of its divisors is an integer number (6478056).

Almost surely, 2^86331861 is an apocalyptic number.

It is an amenable number.

86331861 is a deficient number, since it is larger than the sum of its proper divisors (69141483).

86331861 is a wasteful number, since it uses less digits than its factorization.

86331861 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 124601 (or 124598 counting only the distinct ones).

The product of its digits is 20736, while the sum is 36.

The square root of 86331861 is about 9291.4940133436. The cubic root of 86331861 is about 441.9675334288.

The spelling of 86331861 in words is "eighty-six million, three hundred thirty-one thousand, eight hundred sixty-one".