99987049 has 4 divisors (see below), whose sum is σ = 104334336. Its totient is φ = 95639764.

The previous prime is 99987037. The next prime is 99987067. The reversal of 99987049 is 94078999.

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 cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-99987049 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (99987089) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2173609 + ... + 2173654.

It is an arithmetic number, because the mean of its divisors is an integer number (26083584).

Almost surely, 2^99987049 is an apocalyptic number.

It is an amenable number.

99987049 is a deficient number, since it is larger than the sum of its proper divisors (4347287).

99987049 is a wasteful number, since it uses less digits than its factorization.

99987049 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4347286.

The product of its (nonzero) digits is 1469664, while the sum is 55.

The square root of 99987049 is about 9999.3524290326. The cubic root of 99987049 is about 464.1388447572.

The spelling of 99987049 in words is "ninety-nine million, nine hundred eighty-seven thousand, forty-nine".