16989937 has 2 divisors, whose sum is σ = 16989938. Its totient is φ = 16989936.

The previous prime is 16989887. The next prime is 16989941. The reversal of 16989937 is 73998961.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 9678321 + 7311616 = 3111^2 + 2704^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-16989937 is a prime.

It is not a weakly prime, because it can be changed into another prime (16989967) 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, 8494968 + 8494969.

It is an arithmetic number, because the mean of its divisors is an integer number (8494969).

Almost surely, 2^16989937 is an apocalyptic number.

It is an amenable number.

16989937 is a deficient number, since it is larger than the sum of its proper divisors (1).

16989937 is an equidigital number, since it uses as much as digits as its factorization.

16989937 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 734832, while the sum is 52.

The square root of 16989937 is about 4121.8851269777. The cubic root of 16989937 is about 257.0774141368.

The spelling of 16989937 in words is "sixteen million, nine hundred eighty-nine thousand, nine hundred thirty-seven".