865086431 has 8 divisors (see below), whose sum is σ = 944022144. Its totient is φ = 786199320.

The previous prime is 865086389. The next prime is 865086433. The reversal of 865086431 is 134680568.

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 865086431 - 2¹⁴ = 865070047 is a prime.

It is a super-2 number, since 2×865086431² = 1496749066200635522, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (865086433) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 32096 + ... + 52538.

It is an arithmetic number, because the mean of its divisors is an integer number (118002768).

Almost surely, 2^865086431 is an apocalyptic number.

865086431 is a deficient number, since it is larger than the sum of its proper divisors (78935713).

865086431 is a wasteful number, since it uses less digits than its factorization.

865086431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24301.

The product of its (nonzero) digits is 138240, while the sum is 41.

The square root of 865086431 is about 29412.3516740841. The cubic root of 865086431 is about 952.8396773277.

The spelling of 865086431 in words is "eight hundred sixty-five million, eighty-six thousand, four hundred thirty-one".