16989799 has 2 divisors, whose sum is σ = 16989800. Its totient is φ = 16989798.

The previous prime is 16989779. The next prime is 16989821. The reversal of 16989799 is 99798961.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 16989799 - 2⁷ = 16989671 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (16989719) 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, 8494899 + 8494900.

It is an arithmetic number, because the mean of its divisors is an integer number (8494900).

Almost surely, 2^16989799 is an apocalyptic number.

16989799 is a deficient number, since it is larger than the sum of its proper divisors (1).

16989799 is an equidigital number, since it uses as much as digits as its factorization.

16989799 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2204496, while the sum is 58.

The square root of 16989799 is about 4121.8683870303. The cubic root of 16989799 is about 257.0767181017.

The spelling of 16989799 in words is "sixteen million, nine hundred eighty-nine thousand, seven hundred ninety-nine".