16344989 has 2 divisors, whose sum is σ = 16344990. Its totient is φ = 16344988.

The previous prime is 16344983. The next prime is 16345003. The reversal of 16344989 is 98944361.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 16337764 + 7225 = 4042^2 + 85^2 .

It is an emirp because it is prime and its reverse (98944361) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 16344989 - 2¹⁶ = 16279453 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 (16344983) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8172494 + 8172495.

It is an arithmetic number, because the mean of its divisors is an integer number (8172495).

Almost surely, 2^16344989 is an apocalyptic number.

It is an amenable number.

16344989 is a deficient number, since it is larger than the sum of its proper divisors (1).

16344989 is an equidigital number, since it uses as much as digits as its factorization.

16344989 is an evil number, because the sum of its binary digits is even.

The product of its digits is 186624, while the sum is 44.

The square root of 16344989 is about 4042.8936419352. The cubic root of 16344989 is about 253.7824257462.

The spelling of 16344989 in words is "sixteen million, three hundred forty-four thousand, nine hundred eighty-nine".