16988887 has 2 divisors, whose sum is σ = 16988888. Its totient is φ = 16988886.

The previous prime is 16988879. The next prime is 16988891. The reversal of 16988887 is 78888961.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 16988887 - 2³ = 16988879 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (16988897) 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, 8494443 + 8494444.

It is an arithmetic number, because the mean of its divisors is an integer number (8494444).

Almost surely, 2^16988887 is an apocalyptic number.

16988887 is a deficient number, since it is larger than the sum of its proper divisors (1).

16988887 is an equidigital number, since it uses as much as digits as its factorization.

16988887 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1548288, while the sum is 55.

The square root of 16988887 is about 4121.7577561036. The cubic root of 16988887 is about 257.0721181226.

It can be divided in two parts, 1698 and 8887, that added together give a triangular number (10585 = T₁₄₅).

The spelling of 16988887 in words is "sixteen million, nine hundred eighty-eight thousand, eight hundred eighty-seven".