621342013 has 2 divisors, whose sum is σ = 621342014. Its totient is φ = 621342012.

The previous prime is 621341969. The next prime is 621342089. The reversal of 621342013 is 310243126.

621342013 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 345848409 + 275493604 = 18597^2 + 16598^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-621342013 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (621342713) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 310671006 + 310671007.

It is an arithmetic number, because the mean of its divisors is an integer number (310671007).

Almost surely, 2^621342013 is an apocalyptic number.

It is an amenable number.

621342013 is a deficient number, since it is larger than the sum of its proper divisors (1).

621342013 is an equidigital number, since it uses as much as digits as its factorization.

621342013 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 864, while the sum is 22.

The square root of 621342013 is about 24926.7328986372. The cubic root of 621342013 is about 853.3166899254.

Adding to 621342013 its reverse (310243126), we get a palindrome (931585139).

The spelling of 621342013 in words is "six hundred twenty-one million, three hundred forty-two thousand, thirteen".