87668869 has 4 divisors (see below), whose sum is σ = 92283040. Its totient is φ = 83054700.

The previous prime is 87668857. The next prime is 87668879. The reversal of 87668869 is 96886678.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a de Polignac number, because none of the positive numbers 2^k-87668869 is a prime.

It is a super-2 number, since 2×87668869² = 15371661183478322, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (87668849) 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 3 ways as a sum of consecutive naturals, for example, 2307057 + ... + 2307094.

It is an arithmetic number, because the mean of its divisors is an integer number (23070760).

Almost surely, 2^87668869 is an apocalyptic number.

It is an amenable number.

87668869 is a deficient number, since it is larger than the sum of its proper divisors (4614171).

87668869 is a wasteful number, since it uses less digits than its factorization.

87668869 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4614170.

The product of its digits is 6967296, while the sum is 58.

The square root of 87668869 is about 9363.1655437678. The cubic root of 87668869 is about 444.2374163123.

The spelling of 87668869 in words is "eighty-seven million, six hundred sixty-eight thousand, eight hundred sixty-nine".