99938409 has 8 divisors (see below), whose sum is σ = 133304640. Its totient is φ = 66598896.

The previous prime is 99938401. The next prime is 99938431. The reversal of 99938409 is 90483999.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 99938409 - 2³ = 99938401 is a prime.

It is not an unprimeable number, because it can be changed into a prime (99938401) 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, 4939 + ... + 14975.

It is an arithmetic number, because the mean of its divisors is an integer number (16663080).

Almost surely, 2^99938409 is an apocalyptic number.

It is an amenable number.

99938409 is a deficient number, since it is larger than the sum of its proper divisors (33366231).

99938409 is a wasteful number, since it uses less digits than its factorization.

99938409 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13359.

The product of its (nonzero) digits is 629856, while the sum is 51.

The square root of 99938409 is about 9996.9199756725. The cubic root of 99938409 is about 464.0635704246.

The spelling of 99938409 in words is "ninety-nine million, nine hundred thirty-eight thousand, four hundred nine".