99987051 has 4 divisors (see below), whose sum is σ = 133316072. Its totient is φ = 66658032.

The previous prime is 99987037. The next prime is 99987067. The reversal of 99987051 is 15078999.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 99987051 - 2⁹ = 99986539 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (99987011) 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, 16664506 + ... + 16664511.

It is an arithmetic number, because the mean of its divisors is an integer number (33329018).

Almost surely, 2^99987051 is an apocalyptic number.

99987051 is a deficient number, since it is larger than the sum of its proper divisors (33329021).

99987051 is a wasteful number, since it uses less digits than its factorization.

99987051 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33329020.

The product of its (nonzero) digits is 204120, while the sum is 48.

The square root of 99987051 is about 9999.3525290391. The cubic root of 99987051 is about 464.1388478519.

The spelling of 99987051 in words is "ninety-nine million, nine hundred eighty-seven thousand, fifty-one".