86430857 has 2 divisors, whose sum is σ = 86430858. Its totient is φ = 86430856.

The previous prime is 86430847. The next prime is 86430859. The reversal of 86430857 is 75803468.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 64705936 + 21724921 = 8044^2 + 4661^2 .

It is a cyclic number.

It is not a de Polignac number, because 86430857 - 2⁶ = 86430793 is a prime.

Together with 86430859, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (86430859) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43215428 + 43215429.

It is an arithmetic number, because the mean of its divisors is an integer number (43215429).

Almost surely, 2^86430857 is an apocalyptic number.

It is an amenable number.

86430857 is a deficient number, since it is larger than the sum of its proper divisors (1).

86430857 is an equidigital number, since it uses as much as digits as its factorization.

86430857 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 161280, while the sum is 41.

The square root of 86430857 is about 9296.8197250458. The cubic root of 86430857 is about 442.1364023505.

The spelling of 86430857 in words is "eighty-six million, four hundred thirty thousand, eight hundred fifty-seven".