39996613 has 2 divisors, whose sum is σ = 39996614. Its totient is φ = 39996612.

The previous prime is 39996589. The next prime is 39996617. The reversal of 39996613 is 31669993.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 23980609 + 16016004 = 4897^2 + 4002^2 .

It is a cyclic number.

It is not a de Polignac number, because 39996613 - 2⁵ = 39996581 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (39996617) 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, 19998306 + 19998307.

It is an arithmetic number, because the mean of its divisors is an integer number (19998307).

Almost surely, 2^39996613 is an apocalyptic number.

It is an amenable number.

39996613 is a deficient number, since it is larger than the sum of its proper divisors (1).

39996613 is an equidigital number, since it uses as much as digits as its factorization.

39996613 is an odious number, because the sum of its binary digits is odd.

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

The square root of 39996613 is about 6324.2875488074. The cubic root of 39996613 is about 341.9855362487.

The spelling of 39996613 in words is "thirty-nine million, nine hundred ninety-six thousand, six hundred thirteen".