86939609 has 8 divisors (see below), whose sum is σ = 91324032. Its totient is φ = 82605600.

The previous prime is 86939551. The next prime is 86939617. The reversal of 86939609 is 90693968.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-86939609 is a prime.

It is a super-2 number, since 2×86939609² = 15116991226145762, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (86930609) 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, 9044 + ... + 15989.

It is an arithmetic number, because the mean of its divisors is an integer number (11415504).

Almost surely, 2^86939609 is an apocalyptic number.

It is an amenable number.

86939609 is a deficient number, since it is larger than the sum of its proper divisors (4384423).

86939609 is a wasteful number, since it uses less digits than its factorization.

86939609 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25207.

The product of its (nonzero) digits is 629856, while the sum is 50.

The square root of 86939609 is about 9324.1411936971. The cubic root of 86939609 is about 443.0022114652.

The spelling of 86939609 in words is "eighty-six million, nine hundred thirty-nine thousand, six hundred nine".