16988819 has 2 divisors, whose sum is σ = 16988820. Its totient is φ = 16988818.

The previous prime is 16988791. The next prime is 16988843. The reversal of 16988819 is 91888961.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 16988819 - 2⁸ = 16988563 is a prime.

It is a super-2 number, since 2×16988819² = 577239942029522, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (16988879) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8494409 + 8494410.

It is an arithmetic number, because the mean of its divisors is an integer number (8494410).

Almost surely, 2^16988819 is an apocalyptic number.

16988819 is a deficient number, since it is larger than the sum of its proper divisors (1).

16988819 is an equidigital number, since it uses as much as digits as its factorization.

16988819 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 248832, while the sum is 50.

The square root of 16988819 is about 4121.7495071875. The cubic root of 16988819 is about 257.0717751351.

It can be divided in two parts, 169 and 88819, that added together give a palindrome (88988).

The spelling of 16988819 in words is "sixteen million, nine hundred eighty-eight thousand, eight hundred nineteen".