16899999 has 4 divisors (see below), whose sum is σ = 22533336. Its totient is φ = 11266664.

The previous prime is 16899973. The next prime is 16900021. The reversal of 16899999 is 99999861.

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 16899999 - 2¹² = 16895903 is a prime.

16899999 is a modest number, since divided by 9999 gives 1689 as remainder.

It is a plaindrome in base 10.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16899959) 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, 2816664 + ... + 2816669.

It is an arithmetic number, because the mean of its divisors is an integer number (5633334).

Almost surely, 2^16899999 is an apocalyptic number.

16899999 is a deficient number, since it is larger than the sum of its proper divisors (5633337).

16899999 is an equidigital number, since it uses as much as digits as its factorization.

16899999 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5633336.

The product of its digits is 2834352, while the sum is 60.

The square root of 16899999 is about 4110.9608365928. The cubic root of 16899999 is about 256.6229893257.

The spelling of 16899999 in words is "sixteen million, eight hundred ninety-nine thousand, nine hundred ninety-nine".