99998906 has 16 divisors (see below), whose sum is σ = 174926400. Its totient is φ = 42856380.

The previous prime is 99998891. The next prime is 99998909. The reversal of 99998906 is 60989999.

It is not an unprimeable number, because it can be changed into a prime (99998909) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 72200 + ... + 73571.

It is an arithmetic number, because the mean of its divisors is an integer number (10932900).

Almost surely, 2^99998906 is an apocalyptic number.

99998906 is a deficient number, since it is larger than the sum of its proper divisors (74927494).

99998906 is a wasteful number, since it uses less digits than its factorization.

99998906 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 145794 (or 145780 counting only the distinct ones).

The product of its (nonzero) digits is 2834352, while the sum is 59.

The square root of 99998906 is about 9999.9452998504. The cubic root of 99998906 is about 464.1571907224.

The spelling of 99998906 in words is "ninety-nine million, nine hundred ninety-eight thousand, nine hundred six".