86431655 has 8 divisors (see below), whose sum is σ = 109819152. Its totient is φ = 65077888.

The previous prime is 86431651. The next prime is 86431661. The reversal of 86431655 is 55613468.

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 86431655 - 2² = 86431651 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (86431651) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 508337 + ... + 508506.

It is an arithmetic number, because the mean of its divisors is an integer number (13727394).

Almost surely, 2^86431655 is an apocalyptic number.

86431655 is a gapful number since it is divisible by the number (85) formed by its first and last digit.

86431655 is a deficient number, since it is larger than the sum of its proper divisors (23387497).

86431655 is a wasteful number, since it uses less digits than its factorization.

86431655 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1016865.

The product of its digits is 86400, while the sum is 38.

The square root of 86431655 is about 9296.8626428489. The cubic root of 86431655 is about 442.1377630674.

The spelling of 86431655 in words is "eighty-six million, four hundred thirty-one thousand, six hundred fifty-five".