86142609 has 40 divisors (see below), whose sum is σ = 148258880. Its totient is φ = 48825504.

The previous prime is 86142601. The next prime is 86142733. The reversal of 86142609 is 90624168.

86142609 is a `hidden beast` number, since 8 + 6 + 1 + 42 + 609 = 666.

It is not a de Polignac number, because 86142609 - 2³ = 86142601 is a prime.

It is a hoax number, since the sum of its digits (36) 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 (86142601) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 78267 + ... + 79359.

It is an arithmetic number, because the mean of its divisors is an integer number (3706472).

Almost surely, 2^86142609 is an apocalyptic number.

It is an amenable number.

86142609 is a deficient number, since it is larger than the sum of its proper divisors (62116271).

86142609 is a wasteful number, since it uses less digits than its factorization.

86142609 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1251 (or 1242 counting only the distinct ones).

The product of its (nonzero) digits is 20736, while the sum is 36.

The square root of 86142609 is about 9281.3042725686. The cubic root of 86142609 is about 441.6443447759.

The spelling of 86142609 in words is "eighty-six million, one hundred forty-two thousand, six hundred nine".