620646223 has 2 divisors, whose sum is σ = 620646224. Its totient is φ = 620646222.

The previous prime is 620646211. The next prime is 620646227. The reversal of 620646223 is 322646026.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-620646223 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (620646227) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 310323111 + 310323112.

It is an arithmetic number, because the mean of its divisors is an integer number (310323112).

Almost surely, 2^620646223 is an apocalyptic number.

620646223 is a deficient number, since it is larger than the sum of its proper divisors (1).

620646223 is an equidigital number, since it uses as much as digits as its factorization.

620646223 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 20736, while the sum is 31.

The square root of 620646223 is about 24912.7722865200. The cubic root of 620646223 is about 852.9980511466.

The spelling of 620646223 in words is "six hundred twenty million, six hundred forty-six thousand, two hundred twenty-three".