16940369 has 2 divisors, whose sum is σ = 16940370. Its totient is φ = 16940368.

The previous prime is 16940327. The next prime is 16940377. The reversal of 16940369 is 96304961.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 12166144 + 4774225 = 3488^2 + 2185^2 .

It is an emirp because it is prime and its reverse (96304961) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 16940369 - 2⁸ = 16940113 is a prime.

It is a super-2 number, since 2×16940369² = 573952203712322, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (16940389) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8470184 + 8470185.

It is an arithmetic number, because the mean of its divisors is an integer number (8470185).

Almost surely, 2^16940369 is an apocalyptic number.

It is an amenable number.

16940369 is a deficient number, since it is larger than the sum of its proper divisors (1).

16940369 is an equidigital number, since it uses as much as digits as its factorization.

16940369 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 34992, while the sum is 38.

The square root of 16940369 is about 4115.8679522064. The cubic root of 16940369 is about 256.8271635377.

The spelling of 16940369 in words is "sixteen million, nine hundred forty thousand, three hundred sixty-nine".