86942831 has 2 divisors, whose sum is σ = 86942832. Its totient is φ = 86942830.

The previous prime is 86942797. The next prime is 86942857. The reversal of 86942831 is 13824968.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 86942831 - 2⁶ = 86942767 is a prime.

It is a super-2 number, since 2×86942831² = 15118111724589122, 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 (86941831) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43471415 + 43471416.

It is an arithmetic number, because the mean of its divisors is an integer number (43471416).

Almost surely, 2^86942831 is an apocalyptic number.

86942831 is a deficient number, since it is larger than the sum of its proper divisors (1).

86942831 is an equidigital number, since it uses as much as digits as its factorization.

86942831 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 82944, while the sum is 41.

The square root of 86942831 is about 9324.3139694028. The cubic root of 86942831 is about 443.0076839823.

The spelling of 86942831 in words is "eighty-six million, nine hundred forty-two thousand, eight hundred thirty-one".