86653639 has 4 divisors (see below), whose sum is σ = 86738080. Its totient is φ = 86569200.

The previous prime is 86653613. The next prime is 86653663. The reversal of 86653639 is 93635668.

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

It is a cyclic number.

It is not a de Polignac number, because 86653639 - 2¹⁵ = 86620871 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (86653669) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 40662 + ... + 42739.

It is an arithmetic number, because the mean of its divisors is an integer number (21684520).

Almost surely, 2^86653639 is an apocalyptic number.

86653639 is a deficient number, since it is larger than the sum of its proper divisors (84441).

86653639 is a wasteful number, since it uses less digits than its factorization.

86653639 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 84440.

The product of its digits is 699840, while the sum is 46.

The square root of 86653639 is about 9308.7936382756. The cubic root of 86653639 is about 442.5159563123.

The spelling of 86653639 in words is "eighty-six million, six hundred fifty-three thousand, six hundred thirty-nine".