16719899 has 4 divisors (see below), whose sum is σ = 19108464. Its totient is φ = 14331336.

The previous prime is 16719889. The next prime is 16719907. The reversal of 16719899 is 99891761.

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 16719899 - 2⁴ = 16719883 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (16719839) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1194272 + ... + 1194285.

It is an arithmetic number, because the mean of its divisors is an integer number (4777116).

Almost surely, 2^16719899 is an apocalyptic number.

16719899 is a deficient number, since it is larger than the sum of its proper divisors (2388565).

16719899 is an equidigital number, since it uses as much as digits as its factorization.

16719899 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2388564.

The product of its digits is 244944, while the sum is 50.

The square root of 16719899 is about 4088.9973098548. The cubic root of 16719899 is about 255.7081380412.

The spelling of 16719899 in words is "sixteen million, seven hundred nineteen thousand, eight hundred ninety-nine".