620629934647 has 2 divisors, whose sum is σ = 620629934648. Its totient is φ = 620629934646.

The previous prime is 620629934597. The next prime is 620629934753. The reversal of 620629934647 is 746439926026.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-620629934647 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 620629934591 and 620629934600.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (620629974647) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 310314967323 + 310314967324.

It is an arithmetic number, because the mean of its divisors is an integer number (310314967324).

Almost surely, 2^620629934647 is an apocalyptic number.

620629934647 is a deficient number, since it is larger than the sum of its proper divisors (1).

620629934647 is an equidigital number, since it uses as much as digits as its factorization.

620629934647 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 23514624, while the sum is 58.

The spelling of 620629934647 in words is "six hundred twenty billion, six hundred twenty-nine million, nine hundred thirty-four thousand, six hundred forty-seven".