39730013 has 2 divisors, whose sum is σ = 39730014. Its totient is φ = 39730012.

The previous prime is 39730001. The next prime is 39730051. The reversal of 39730013 is 31003793.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 39601849 + 128164 = 6293^2 + 358^2 .

It is a cyclic number.

It is not a de Polignac number, because 39730013 - 2⁴ = 39729997 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (39732013) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19865006 + 19865007.

It is an arithmetic number, because the mean of its divisors is an integer number (19865007).

Almost surely, 2^39730013 is an apocalyptic number.

It is an amenable number.

39730013 is a deficient number, since it is larger than the sum of its proper divisors (1).

39730013 is an equidigital number, since it uses as much as digits as its factorization.

39730013 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1701, while the sum is 26.

The square root of 39730013 is about 6303.1748349542. The cubic root of 39730013 is about 341.2239995039.

The spelling of 39730013 in words is "thirty-nine million, seven hundred thirty thousand, thirteen".