86257689 has 12 divisors (see below), whose sum is σ = 133787664. Its totient is φ = 49290024.

The previous prime is 86257679. The next prime is 86257697. The reversal of 86257689 is 98675268.

It is not a de Polignac number, because 86257689 - 2⁴ = 86257673 is a prime.

It is a hoax number, since the sum of its digits (51) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (86257669) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 293247 + ... + 293540.

It is an arithmetic number, because the mean of its divisors is an integer number (11148972).

Almost surely, 2^86257689 is an apocalyptic number.

It is an amenable number.

86257689 is a deficient number, since it is larger than the sum of its proper divisors (47529975).

86257689 is a wasteful number, since it uses less digits than its factorization.

86257689 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 586804 (or 586797 counting only the distinct ones).

The product of its digits is 1451520, while the sum is 51.

The square root of 86257689 is about 9287.5017631223. The cubic root of 86257689 is about 441.8409250592.

The spelling of 86257689 in words is "eighty-six million, two hundred fifty-seven thousand, six hundred eighty-nine".