39628613 has 2 divisors, whose sum is σ = 39628614. Its totient is φ = 39628612.

The previous prime is 39628607. The next prime is 39628637. The reversal of 39628613 is 31682693.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 20948929 + 18679684 = 4577^2 + 4322^2 .

It is a cyclic number.

It is not a de Polignac number, because 39628613 - 2⁶ = 39628549 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (39628643) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19814306 + 19814307.

It is an arithmetic number, because the mean of its divisors is an integer number (19814307).

Almost surely, 2^39628613 is an apocalyptic number.

It is an amenable number.

39628613 is a deficient number, since it is larger than the sum of its proper divisors (1).

39628613 is an equidigital number, since it uses as much as digits as its factorization.

39628613 is an evil number, because the sum of its binary digits is even.

The product of its digits is 46656, while the sum is 38.

The square root of 39628613 is about 6295.1261305871. The cubic root of 39628613 is about 340.9334585206.

The spelling of 39628613 in words is "thirty-nine million, six hundred twenty-eight thousand, six hundred thirteen".