620346971 has 2 divisors, whose sum is σ = 620346972. Its totient is φ = 620346970.

The previous prime is 620346953. The next prime is 620346977. The reversal of 620346971 is 179643026.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 620346971 - 2²⁶ = 553238107 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (620346977) 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, 310173485 + 310173486.

It is an arithmetic number, because the mean of its divisors is an integer number (310173486).

Almost surely, 2^620346971 is an apocalyptic number.

620346971 is a deficient number, since it is larger than the sum of its proper divisors (1).

620346971 is an equidigital number, since it uses as much as digits as its factorization.

620346971 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 54432, while the sum is 38.

The square root of 620346971 is about 24906.7655668094. The cubic root of 620346971 is about 852.8609347025.

Adding to 620346971 its reverse (179643026), we get a palindrome (799989997).

The spelling of 620346971 in words is "six hundred twenty million, three hundred forty-six thousand, nine hundred seventy-one".