16939369 has 4 divisors (see below), whose sum is σ = 16947796. Its totient is φ = 16930944.

The previous prime is 16939367. The next prime is 16939399. The reversal of 16939369 is 96393961.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 6953769 + 9985600 = 2637^2 + 3160^2 .

It is a cyclic number.

It is not a de Polignac number, because 16939369 - 2¹ = 16939367 is a prime.

It is a super-2 number, since 2×16939369² = 573884444236322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (16939367) 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 in 3 ways as a sum of consecutive naturals, for example, 757 + ... + 5869.

It is an arithmetic number, because the mean of its divisors is an integer number (4236949).

Almost surely, 2^16939369 is an apocalyptic number.

It is an amenable number.

16939369 is a deficient number, since it is larger than the sum of its proper divisors (8427).

16939369 is an equidigital number, since it uses as much as digits as its factorization.

16939369 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8426.

The product of its digits is 236196, while the sum is 46.

The square root of 16939369 is about 4115.7464693540. The cubic root of 16939369 is about 256.8221098852.

The spelling of 16939369 in words is "sixteen million, nine hundred thirty-nine thousand, three hundred sixty-nine".