86047831 has 2 divisors, whose sum is σ = 86047832. Its totient is φ = 86047830.

The previous prime is 86047757. The next prime is 86047873. The reversal of 86047831 is 13874068.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-86047831 is a prime.

It is a super-2 number, since 2×86047831² = 14808458439609122, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (86047891) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43023915 + 43023916.

It is an arithmetic number, because the mean of its divisors is an integer number (43023916).

Almost surely, 2^86047831 is an apocalyptic number.

86047831 is a deficient number, since it is larger than the sum of its proper divisors (1).

86047831 is an equidigital number, since it uses as much as digits as its factorization.

86047831 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 32256, while the sum is 37.

The square root of 86047831 is about 9276.1970117069. The cubic root of 86047831 is about 441.4823129661.

The spelling of 86047831 in words is "eighty-six million, forty-seven thousand, eight hundred thirty-one".