99900887 has 4 divisors (see below), whose sum is σ = 102337536. Its totient is φ = 97464240.

The previous prime is 99900883. The next prime is 99900893. The reversal of 99900887 is 78800999.

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 99900887 - 2² = 99900883 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 (99900883) 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, 1218263 + ... + 1218344.

It is an arithmetic number, because the mean of its divisors is an integer number (25584384).

Almost surely, 2^99900887 is an apocalyptic number.

99900887 is a deficient number, since it is larger than the sum of its proper divisors (2436649).

99900887 is a wasteful number, since it uses less digits than its factorization.

99900887 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2436648.

The product of its (nonzero) digits is 326592, while the sum is 50.

The square root of 99900887 is about 9995.0431214678. The cubic root of 99900887 is about 464.0054854063.

The spelling of 99900887 in words is "ninety-nine million, nine hundred thousand, eight hundred eighty-seven".