16044989 has 2 divisors, whose sum is σ = 16044990. Its totient is φ = 16044988.

The previous prime is 16044967. The next prime is 16044997. The reversal of 16044989 is 98944061.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 15760900 + 284089 = 3970^2 + 533^2 .

It is an emirp because it is prime and its reverse (98944061) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 16044989 - 2⁸ = 16044733 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (16044089) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8022494 + 8022495.

It is an arithmetic number, because the mean of its divisors is an integer number (8022495).

Almost surely, 2^16044989 is an apocalyptic number.

It is an amenable number.

16044989 is a deficient number, since it is larger than the sum of its proper divisors (1).

16044989 is an equidigital number, since it uses as much as digits as its factorization.

16044989 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 62208, while the sum is 41.

The square root of 16044989 is about 4005.6196774032. The cubic root of 16044989 is about 252.2201664124.

The spelling of 16044989 in words is "sixteen million, forty-four thousand, nine hundred eighty-nine".