620040013 has 2 divisors, whose sum is σ = 620040014. Its totient is φ = 620040012.

The previous prime is 620040011. The next prime is 620040067. The reversal of 620040013 is 310040026.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 463239529 + 156800484 = 21523^2 + 12522^2 .

It is a cyclic number.

It is not a de Polignac number, because 620040013 - 2¹ = 620040011 is a prime.

Together with 620040011, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (620040011) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 310020006 + 310020007.

It is an arithmetic number, because the mean of its divisors is an integer number (310020007).

Almost surely, 2^620040013 is an apocalyptic number.

It is an amenable number.

620040013 is a deficient number, since it is larger than the sum of its proper divisors (1).

620040013 is an equidigital number, since it uses as much as digits as its factorization.

620040013 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 144, while the sum is 16.

The square root of 620040013 is about 24900.6026633895. The cubic root of 620040013 is about 852.7202415685.

Adding to 620040013 its reverse (310040026), we get a palindrome (930080039).

The spelling of 620040013 in words is "six hundred twenty million, forty thousand, thirteen".