99387998 has 4 divisors (see below), whose sum is σ = 149082000. Its totient is φ = 49693998.

The previous prime is 99387989. The next prime is 99388013. The reversal of 99387998 is 89978399.

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

It is a self number, because there is not a number n which added to its sum of digits gives 99387998.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 24846998 + ... + 24847001.

It is an arithmetic number, because the mean of its divisors is an integer number (37270500).

Almost surely, 2^99387998 is an apocalyptic number.

99387998 is a deficient number, since it is larger than the sum of its proper divisors (49694002).

99387998 is a wasteful number, since it uses less digits than its factorization.

99387998 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 49694001.

The product of its digits is 8817984, while the sum is 62.

The square root of 99387998 is about 9969.3529378792. The cubic root of 99387998 is about 463.2100578940.

The spelling of 99387998 in words is "ninety-nine million, three hundred eighty-seven thousand, nine hundred ninety-eight".