99993998 has 32 divisors (see below), whose sum is σ = 174212640. Its totient is φ = 42647040.

The previous prime is 99993997. The next prime is 99994009. The reversal of 99993998 is 89939999.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (99993991) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 17786 + ... + 22722.

It is an arithmetic number, because the mean of its divisors is an integer number (5444145).

Almost surely, 2^99993998 is an apocalyptic number.

99993998 is a deficient number, since it is larger than the sum of its proper divisors (74218642).

99993998 is a wasteful number, since it uses less digits than its factorization.

99993998 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5012.

The product of its digits is 12754584, while the sum is 65.

The square root of 99993998 is about 9999.6998954969. The cubic root of 99993998 is about 464.1495969034.

The spelling of 99993998 in words is "ninety-nine million, nine hundred ninety-three thousand, nine hundred ninety-eight".