86256689 has 2 divisors, whose sum is σ = 86256690. Its totient is φ = 86256688.

The previous prime is 86256679. The next prime is 86256763. The reversal of 86256689 is 98665268.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 52998400 + 33258289 = 7280^2 + 5767^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-86256689 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (86256619) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43128344 + 43128345.

It is an arithmetic number, because the mean of its divisors is an integer number (43128345).

Almost surely, 2^86256689 is an apocalyptic number.

It is an amenable number.

86256689 is a deficient number, since it is larger than the sum of its proper divisors (1).

86256689 is an equidigital number, since it uses as much as digits as its factorization.

86256689 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1244160, while the sum is 50.

The square root of 86256689 is about 9287.4479271757. The cubic root of 86256689 is about 441.8392176071.

The spelling of 86256689 in words is "eighty-six million, two hundred fifty-six thousand, six hundred eighty-nine".