16919999 has 2 divisors, whose sum is σ = 16920000. Its totient is φ = 16919998.

The previous prime is 16919977. The next prime is 16920011. The reversal of 16919999 is 99991961.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 16919999 - 2²⁰ = 15871423 is a prime.

16919999 is a modest number, since divided by 9999 gives 1691 as remainder.

It is a self number, because there is not a number n which added to its sum of digits gives 16919999.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (16919909) 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 as a sum of consecutive naturals, namely, 8459999 + 8460000.

It is an arithmetic number, because the mean of its divisors is an integer number (8460000).

Almost surely, 2^16919999 is an apocalyptic number.

16919999 is a deficient number, since it is larger than the sum of its proper divisors (1).

16919999 is an equidigital number, since it uses as much as digits as its factorization.

16919999 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 354294, while the sum is 53.

The square root of 16919999 is about 4113.3926386865. The cubic root of 16919999 is about 256.7241813727.

The spelling of 16919999 in words is "sixteen million, nine hundred nineteen thousand, nine hundred ninety-nine".