99987669 has 16 divisors (see below), whose sum is σ = 149216640. Its totient is φ = 66169440.

The previous prime is 99987619. The next prime is 99987683. The reversal of 99987669 is 96678999.

It is not a de Polignac number, because 99987669 - 2¹² = 99983573 is a prime.

It is a super-2 number, since 2×99987669² = 19995067904107122, 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 (99987619) 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, 9817 + ... + 17214.

It is an arithmetic number, because the mean of its divisors is an integer number (9326040).

Almost surely, 2^99987669 is an apocalyptic number.

It is an amenable number.

99987669 is a deficient number, since it is larger than the sum of its proper divisors (49228971).

99987669 is a wasteful number, since it uses less digits than its factorization.

99987669 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27177 (or 27171 counting only the distinct ones).

The product of its digits is 13226976, while the sum is 63.

The square root of 99987669 is about 9999.3834309921. The cubic root of 99987669 is about 464.1398040997.

The spelling of 99987669 in words is "ninety-nine million, nine hundred eighty-seven thousand, six hundred sixty-nine".