620564047 has 2 divisors, whose sum is σ = 620564048. Its totient is φ = 620564046.

The previous prime is 620564027. The next prime is 620564101. The reversal of 620564047 is 740465026.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-620564047 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (620564027) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 310282023 + 310282024.

It is an arithmetic number, because the mean of its divisors is an integer number (310282024).

Almost surely, 2^620564047 is an apocalyptic number.

620564047 is a deficient number, since it is larger than the sum of its proper divisors (1).

620564047 is an equidigital number, since it uses as much as digits as its factorization.

620564047 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 40320, while the sum is 34.

The square root of 620564047 is about 24911.1229574261. The cubic root of 620564047 is about 852.9604027198.

The spelling of 620564047 in words is "six hundred twenty million, five hundred sixty-four thousand, forty-seven".