99902087 has 4 divisors (see below), whose sum is σ = 104245680. Its totient is φ = 95558496.

The previous prime is 99902063. The next prime is 99902093. The reversal of 99902087 is 78020999.

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 99902087 - 2¹⁰ = 99901063 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 (99902017) 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, 2171762 + ... + 2171807.

It is an arithmetic number, because the mean of its divisors is an integer number (26061420).

Almost surely, 2^99902087 is an apocalyptic number.

99902087 is a deficient number, since it is larger than the sum of its proper divisors (4343593).

99902087 is a wasteful number, since it uses less digits than its factorization.

99902087 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4343592.

The product of its (nonzero) digits is 81648, while the sum is 44.

The square root of 99902087 is about 9995.1031510435. The cubic root of 99902087 is about 464.0073432622.

The spelling of 99902087 in words is "ninety-nine million, nine hundred two thousand, eighty-seven".