99967998 has 32 divisors (see below), whose sum is σ = 216129312. Its totient is φ = 30643200.

The previous prime is 99967997. The next prime is 99967999. The reversal of 99967998 is 89976999.

It is an interprime number because it is at equal distance from previous prime (99967997) and next prime (99967999).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (99967993) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 19638 + ... + 24198.

It is an arithmetic number, because the mean of its divisors is an integer number (6754041).

Almost surely, 2^99967998 is an apocalyptic number.

99967998 is an abundant number, since it is smaller than the sum of its proper divisors (116161314).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

99967998 is a wasteful number, since it uses less digits than its factorization.

99967998 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4860.

The product of its digits is 19840464, while the sum is 66.

The square root of 99967998 is about 9998.3997719635. The cubic root of 99967998 is about 464.1093647033.

Subtracting from 99967998 its reverse (89976999), we obtain a palindrome (9990999).

The spelling of 99967998 in words is "ninety-nine million, nine hundred sixty-seven thousand, nine hundred ninety-eight".