9939613 has 2 divisors, whose sum is σ = 9939614. Its totient is φ = 9939612.

The previous prime is 9939583. The next prime is 9939617. The reversal of 9939613 is 3169399.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 7496644 + 2442969 = 2738^2 + 1563^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-9939613 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (9939617) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4969806 + 4969807.

It is an arithmetic number, because the mean of its divisors is an integer number (4969807).

Almost surely, 2^9939613 is an apocalyptic number.

It is an amenable number.

9939613 is a deficient number, since it is larger than the sum of its proper divisors (1).

9939613 is an equidigital number, since it uses as much as digits as its factorization.

9939613 is an evil number, because the sum of its binary digits is even.

The product of its digits is 39366, while the sum is 40.

The square root of 9939613 is about 3152.7151790163. The cubic root of 9939613 is about 215.0089269775.

The spelling of 9939613 in words is "nine million, nine hundred thirty-nine thousand, six hundred thirteen".