620412505639 has 2 divisors, whose sum is σ = 620412505640. Its totient is φ = 620412505638.

The previous prime is 620412505637. The next prime is 620412505651. The reversal of 620412505639 is 936505214026.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 620412505639 - 2¹ = 620412505637 is a prime.

Together with 620412505637, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 620412505595 and 620412505604.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (620412505637) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 310206252819 + 310206252820.

It is an arithmetic number, because the mean of its divisors is an integer number (310206252820).

Almost surely, 2^620412505639 is an apocalyptic number.

620412505639 is a deficient number, since it is larger than the sum of its proper divisors (1).

620412505639 is an equidigital number, since it uses as much as digits as its factorization.

620412505639 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 388800, while the sum is 43.

The spelling of 620412505639 in words is "six hundred twenty billion, four hundred twelve million, five hundred five thousand, six hundred thirty-nine".