15639713 has 2 divisors, whose sum is σ = 15639714. Its totient is φ = 15639712.

The previous prime is 15639691. The next prime is 15639727. The reversal of 15639713 is 31793651.

15639713 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 11607649 + 4032064 = 3407^2 + 2008^2 .

It is a cyclic number.

It is not a de Polignac number, because 15639713 - 2¹⁴ = 15623329 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (15639733) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7819856 + 7819857.

It is an arithmetic number, because the mean of its divisors is an integer number (7819857).

Almost surely, 2^15639713 is an apocalyptic number.

It is an amenable number.

15639713 is a deficient number, since it is larger than the sum of its proper divisors (1).

15639713 is an equidigital number, since it uses as much as digits as its factorization.

15639713 is an evil number, because the sum of its binary digits is even.

The product of its digits is 17010, while the sum is 35.

The square root of 15639713 is about 3954.7077009559. The cubic root of 15639713 is about 250.0784447165.

The spelling of 15639713 in words is "fifteen million, six hundred thirty-nine thousand, seven hundred thirteen".