39604813 has 2 divisors, whose sum is σ = 39604814. Its totient is φ = 39604812.

The previous prime is 39604801. The next prime is 39604819. The reversal of 39604813 is 31840693.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 33143049 + 6461764 = 5757^2 + 2542^2 .

It is a cyclic number.

It is not a de Polignac number, because 39604813 - 2¹⁷ = 39473741 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (39604819) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19802406 + 19802407.

It is an arithmetic number, because the mean of its divisors is an integer number (19802407).

Almost surely, 2^39604813 is an apocalyptic number.

It is an amenable number.

39604813 is a deficient number, since it is larger than the sum of its proper divisors (1).

39604813 is an equidigital number, since it uses as much as digits as its factorization.

39604813 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 15552, while the sum is 34.

The square root of 39604813 is about 6293.2354953553. The cubic root of 39604813 is about 340.8651926840.

The spelling of 39604813 in words is "thirty-nine million, six hundred four thousand, eight hundred thirteen".