86257805 has 4 divisors (see below), whose sum is σ = 103509372. Its totient is φ = 69006240.

The previous prime is 86257799. The next prime is 86257811. The reversal of 86257805 is 50875268.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (86257799) and next prime (86257811).

It can be written as a sum of positive squares in 2 ways, for example, as 17732521 + 68525284 = 4211^2 + 8278^2 .

It is not a de Polignac number, because 86257805 - 2⁶ = 86257741 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8625776 + ... + 8625785.

It is an arithmetic number, because the mean of its divisors is an integer number (25877343).

Almost surely, 2^86257805 is an apocalyptic number.

It is an amenable number.

86257805 is a deficient number, since it is larger than the sum of its proper divisors (17251567).

86257805 is a wasteful number, since it uses less digits than its factorization.

86257805 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17251566.

The product of its (nonzero) digits is 134400, while the sum is 41.

The square root of 86257805 is about 9287.5080080719. The cubic root of 86257805 is about 441.8411231228.

The spelling of 86257805 in words is "eighty-six million, two hundred fifty-seven thousand, eight hundred five".