16939669 has 2 divisors, whose sum is σ = 16939670. Its totient is φ = 16939668.

The previous prime is 16939631. The next prime is 16939679. The reversal of 16939669 is 96693961.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 13468900 + 3470769 = 3670^2 + 1863^2 .

It is a cyclic number.

It is not a de Polignac number, because 16939669 - 2⁷ = 16939541 is a prime.

It is a super-2 number, since 2×16939669² = 573904771659122, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (16939679) 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, 8469834 + 8469835.

It is an arithmetic number, because the mean of its divisors is an integer number (8469835).

Almost surely, 2^16939669 is an apocalyptic number.

It is an amenable number.

16939669 is a deficient number, since it is larger than the sum of its proper divisors (1).

16939669 is an equidigital number, since it uses as much as digits as its factorization.

16939669 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 472392, while the sum is 49.

The square root of 16939669 is about 4115.7829145862. The cubic root of 16939669 is about 256.8236260018.

The spelling of 16939669 in words is "sixteen million, nine hundred thirty-nine thousand, six hundred sixty-nine".