16938899 has 4 divisors (see below), whose sum is σ = 17830440. Its totient is φ = 16047360.

The previous prime is 16938893. The next prime is 16938917. The reversal of 16938899 is 99883961.

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

It is a cyclic number.

It is not a de Polignac number, because 16938899 - 2²⁴ = 161683 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 16938899.

It is not an unprimeable number, because it can be changed into a prime (16938893) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 445742 + ... + 445779.

It is an arithmetic number, because the mean of its divisors is an integer number (4457610).

Almost surely, 2^16938899 is an apocalyptic number.

16938899 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

16938899 is a deficient number, since it is larger than the sum of its proper divisors (891541).

16938899 is an equidigital number, since it uses as much as digits as its factorization.

16938899 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 891540.

The product of its digits is 839808, while the sum is 53.

The square root of 16938899 is about 4115.6893711747. The cubic root of 16938899 is about 256.8197345998.

The spelling of 16938899 in words is "sixteen million, nine hundred thirty-eight thousand, eight hundred ninety-nine".