16939613 has 2 divisors, whose sum is σ = 16939614. Its totient is φ = 16939612.

The previous prime is 16939591. The next prime is 16939627. The reversal of 16939613 is 31693961.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 12020089 + 4919524 = 3467^2 + 2218^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-16939613 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (16939213) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8469806 + 8469807.

It is an arithmetic number, because the mean of its divisors is an integer number (8469807).

Almost surely, 2^16939613 is an apocalyptic number.

It is an amenable number.

16939613 is a deficient number, since it is larger than the sum of its proper divisors (1).

16939613 is an equidigital number, since it uses as much as digits as its factorization.

16939613 is an evil number, because the sum of its binary digits is even.

The product of its digits is 26244, while the sum is 38.

The square root of 16939613 is about 4115.7761115007. The cubic root of 16939613 is about 256.8233429947.

The spelling of 16939613 in words is "sixteen million, nine hundred thirty-nine thousand, six hundred thirteen".