86372857 has 2 divisors, whose sum is σ = 86372858. Its totient is φ = 86372856.

The previous prime is 86372779. The next prime is 86372893. The reversal of 86372857 is 75827368.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 86322681 + 50176 = 9291^2 + 224^2 .

It is a cyclic number.

It is not a de Polignac number, because 86372857 - 2¹⁹ = 85848569 is a prime.

It is not a weakly prime, because it can be changed into another prime (86372057) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43186428 + 43186429.

It is an arithmetic number, because the mean of its divisors is an integer number (43186429).

Almost surely, 2^86372857 is an apocalyptic number.

It is an amenable number.

86372857 is a deficient number, since it is larger than the sum of its proper divisors (1).

86372857 is an equidigital number, since it uses as much as digits as its factorization.

86372857 is an evil number, because the sum of its binary digits is even.

The product of its digits is 564480, while the sum is 46.

The square root of 86372857 is about 9293.6998552783. The cubic root of 86372857 is about 442.0374806979.

The spelling of 86372857 in words is "eighty-six million, three hundred seventy-two thousand, eight hundred fifty-seven".