86771431 has 4 divisors (see below), whose sum is σ = 87153912. Its totient is φ = 86388952.

The previous prime is 86771413. The next prime is 86771471. The reversal of 86771431 is 13417768.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 86771431 - 2⁹ = 86770919 is a prime.

It is a super-2 number, since 2×86771431² = 15058562475575522, 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 (86771411) 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 3 ways as a sum of consecutive naturals, for example, 190900 + ... + 191353.

It is an arithmetic number, because the mean of its divisors is an integer number (21788478).

Almost surely, 2^86771431 is an apocalyptic number.

86771431 is a deficient number, since it is larger than the sum of its proper divisors (382481).

86771431 is a wasteful number, since it uses less digits than its factorization.

86771431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 382480.

The product of its digits is 28224, while the sum is 37.

The square root of 86771431 is about 9315.1184104122. The cubic root of 86771431 is about 442.7163758193.

The spelling of 86771431 in words is "eighty-six million, seven hundred seventy-one thousand, four hundred thirty-one".