86810431 has 2 divisors, whose sum is σ = 86810432. Its totient is φ = 86810430.

The previous prime is 86810429. The next prime is 86810443. The reversal of 86810431 is 13401868.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 86810431 - 2¹ = 86810429 is a prime.

It is a super-2 number, since 2×86810431² = 15072101860811522, which contains 22 as substring.

Together with 86810429, it forms a pair of twin primes.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 86810393 and 86810402.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (86810401) 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 as a sum of consecutive naturals, namely, 43405215 + 43405216.

It is an arithmetic number, because the mean of its divisors is an integer number (43405216).

Almost surely, 2^86810431 is an apocalyptic number.

86810431 is a deficient number, since it is larger than the sum of its proper divisors (1).

86810431 is an equidigital number, since it uses as much as digits as its factorization.

86810431 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4608, while the sum is 31.

The square root of 86810431 is about 9317.2115463802. The cubic root of 86810431 is about 442.7826931634.

The spelling of 86810431 in words is "eighty-six million, eight hundred ten thousand, four hundred thirty-one".