86357281 has 2 divisors, whose sum is σ = 86357282. Its totient is φ = 86357280.

The previous prime is 86357279. The next prime is 86357317. The reversal of 86357281 is 18275368.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 80640400 + 5716881 = 8980^2 + 2391^2 .

It is a cyclic number.

It is not a de Polignac number, because 86357281 - 2¹ = 86357279 is a prime.

It is a super-2 number, since 2×86357281² = 14915159963425922, which contains 22 as substring.

Together with 86357279, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (86357221) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43178640 + 43178641.

It is an arithmetic number, because the mean of its divisors is an integer number (43178641).

Almost surely, 2^86357281 is an apocalyptic number.

It is an amenable number.

86357281 is a deficient number, since it is larger than the sum of its proper divisors (1).

86357281 is an equidigital number, since it uses as much as digits as its factorization.

86357281 is an evil number, because the sum of its binary digits is even.

The product of its digits is 80640, while the sum is 40.

The square root of 86357281 is about 9292.8618304589. The cubic root of 86357281 is about 442.0109075746.

The spelling of 86357281 in words is "eighty-six million, three hundred fifty-seven thousand, two hundred eighty-one".