86187897 has 6 divisors (see below), whose sum is σ = 124493642. Its totient is φ = 57458592.

The previous prime is 86187889. The next prime is 86187901. The reversal of 86187897 is 79878168.

It can be written as a sum of positive squares in only one way, i.e., 67963536 + 18224361 = 8244^2 + 4269^2 .

It is not a de Polignac number, because 86187897 - 2³ = 86187889 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (86187847) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 4788208 + ... + 4788225.

Almost surely, 2^86187897 is an apocalyptic number.

It is an amenable number.

86187897 is a deficient number, since it is larger than the sum of its proper divisors (38305745).

86187897 is a wasteful number, since it uses less digits than its factorization.

86187897 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9576439 (or 9576436 counting only the distinct ones).

The product of its digits is 1354752, while the sum is 54.

The square root of 86187897 is about 9283.7436952988. The cubic root of 86187897 is about 441.7217268645.

The spelling of 86187897 in words is "eighty-six million, one hundred eighty-seven thousand, eight hundred ninety-seven".