86072257 has 2 divisors, whose sum is σ = 86072258. Its totient is φ = 86072256.

The previous prime is 86072251. The next prime is 86072269. The reversal of 86072257 is 75227068.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 77018176 + 9054081 = 8776^2 + 3009^2 .

It is a cyclic number.

It is not a de Polignac number, because 86072257 - 2¹⁵ = 86039489 is a prime.

It is not a weakly prime, because it can be changed into another prime (86072251) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43036128 + 43036129.

It is an arithmetic number, because the mean of its divisors is an integer number (43036129).

Almost surely, 2^86072257 is an apocalyptic number.

It is an amenable number.

86072257 is a deficient number, since it is larger than the sum of its proper divisors (1).

86072257 is an equidigital number, since it uses as much as digits as its factorization.

86072257 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 47040, while the sum is 37.

The square root of 86072257 is about 9277.5135138678. The cubic root of 86072257 is about 441.5240828618.

The spelling of 86072257 in words is "eighty-six million, seventy-two thousand, two hundred fifty-seven".