16988987 has 2 divisors, whose sum is σ = 16988988. Its totient is φ = 16988986.

The previous prime is 16988947. The next prime is 16989013. The reversal of 16988987 is 78988961.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 16988987 - 2¹⁰ = 16987963 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (16988947) 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, 8494493 + 8494494.

It is an arithmetic number, because the mean of its divisors is an integer number (8494494).

Almost surely, 2^16988987 is an apocalyptic number.

16988987 is a deficient number, since it is larger than the sum of its proper divisors (1).

16988987 is an equidigital number, since it uses as much as digits as its factorization.

16988987 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1741824, while the sum is 56.

The square root of 16988987 is about 4121.7698868326. The cubic root of 16988987 is about 257.0726225143.

The spelling of 16988987 in words is "sixteen million, nine hundred eighty-eight thousand, nine hundred eighty-seven".