86942857 has 2 divisors, whose sum is σ = 86942858. Its totient is φ = 86942856.

The previous prime is 86942831. The next prime is 86942909. The reversal of 86942857 is 75824968.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 79192201 + 7750656 = 8899^2 + 2784^2 .

It is a cyclic number.

It is not a de Polignac number, because 86942857 - 2⁷ = 86942729 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 86942857.

It is not a weakly prime, because it can be changed into another prime (86942257) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43471428 + 43471429.

It is an arithmetic number, because the mean of its divisors is an integer number (43471429).

Almost surely, 2^86942857 is an apocalyptic number.

It is an amenable number.

86942857 is a deficient number, since it is larger than the sum of its proper divisors (1).

86942857 is an equidigital number, since it uses as much as digits as its factorization.

86942857 is an evil number, because the sum of its binary digits is even.

The product of its digits is 967680, while the sum is 49.

The square root of 86942857 is about 9324.3153636071. The cubic root of 86942857 is about 443.0077281424.

The spelling of 86942857 in words is "eighty-six million, nine hundred forty-two thousand, eight hundred fifty-seven".