86688669 has 16 divisors (see below), whose sum is σ = 119016000. Its totient is φ = 56085120.

The previous prime is 86688653. The next prime is 86688671. The reversal of 86688669 is 96688668.

It is not a de Polignac number, because 86688669 - 2⁴ = 86688653 is a prime.

It is a super-2 number, since 2×86688669² = 15029850665983122, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (86688619) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 57082 + ... + 58580.

It is an arithmetic number, because the mean of its divisors is an integer number (7438500).

Almost surely, 2^86688669 is an apocalyptic number.

It is an amenable number.

86688669 is a deficient number, since it is larger than the sum of its proper divisors (32327331).

86688669 is a wasteful number, since it uses less digits than its factorization.

86688669 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2060.

The product of its digits is 5971968, while the sum is 57.

The square root of 86688669 is about 9310.6750023830. The cubic root of 86688669 is about 442.5755777576.

Subtracting 86688669 from its reverse (96688668), we obtain a palindrome (9999999).

The spelling of 86688669 in words is "eighty-six million, six hundred eighty-eight thousand, six hundred sixty-nine".