87693669 has 24 divisors (see below), whose sum is σ = 146128320. Its totient is φ = 49638528.

The previous prime is 87693649. The next prime is 87693707. The reversal of 87693669 is 96639678.

It is a happy number.

It is not a de Polignac number, because 87693669 - 2¹² = 87689573 is a prime.

It is a super-2 number, since 2×87693669² = 15380359165363122, which contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (87693649) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 237 + ... + 13245.

It is an arithmetic number, because the mean of its divisors is an integer number (6088680).

Almost surely, 2^87693669 is an apocalyptic number.

It is an amenable number.

87693669 is a deficient number, since it is larger than the sum of its proper divisors (58434651).

87693669 is a wasteful number, since it uses less digits than its factorization.

87693669 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13129 (or 13126 counting only the distinct ones).

The product of its digits is 2939328, while the sum is 54.

The square root of 87693669 is about 9364.4897885576. The cubic root of 87693669 is about 444.2793013789.

The spelling of 87693669 in words is "eighty-seven million, six hundred ninety-three thousand, six hundred sixty-nine".