39828013 has 2 divisors, whose sum is σ = 39828014. Its totient is φ = 39828012.

The previous prime is 39827999. The next prime is 39828017. The reversal of 39828013 is 31082893.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 37970244 + 1857769 = 6162^2 + 1363^2 .

It is an emirp because it is prime and its reverse (31082893) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 39828013 - 2¹⁷ = 39696941 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 39828013.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (39828017) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19914006 + 19914007.

It is an arithmetic number, because the mean of its divisors is an integer number (19914007).

Almost surely, 2^39828013 is an apocalyptic number.

It is an amenable number.

39828013 is a deficient number, since it is larger than the sum of its proper divisors (1).

39828013 is an equidigital number, since it uses as much as digits as its factorization.

39828013 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 10368, while the sum is 34.

The square root of 39828013 is about 6310.9439072139. The cubic root of 39828013 is about 341.5043290933.

The spelling of 39828013 in words is "thirty-nine million, eight hundred twenty-eight thousand, thirteen".