86187257 has 8 divisors (see below), whose sum is σ = 92952384. Its totient is φ = 79441488.

The previous prime is 86187221. The next prime is 86187271. The reversal of 86187257 is 75278168.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 86187257 - 2⁶ = 86187193 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (86187557) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5198 + ... + 14120.

It is an arithmetic number, because the mean of its divisors is an integer number (11619048).

Almost surely, 2^86187257 is an apocalyptic number.

It is an amenable number.

86187257 is a deficient number, since it is larger than the sum of its proper divisors (6765127).

86187257 is a wasteful number, since it uses less digits than its factorization.

86187257 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9679.

The product of its digits is 188160, while the sum is 44.

The square root of 86187257 is about 9283.7092263814. The cubic root of 86187257 is about 441.7206335068.

The spelling of 86187257 in words is "eighty-six million, one hundred eighty-seven thousand, two hundred fifty-seven".