620124649 has 2 divisors, whose sum is σ = 620124650. Its totient is φ = 620124648.

The previous prime is 620124619. The next prime is 620124667. The reversal of 620124649 is 946421026.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 417916249 + 202208400 = 20443^2 + 14220^2 .

It is a cyclic number.

It is not a de Polignac number, because 620124649 - 2²⁵ = 586570217 is a prime.

It is not a weakly prime, because it can be changed into another prime (620124619) 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, 310062324 + 310062325.

It is an arithmetic number, because the mean of its divisors is an integer number (310062325).

Almost surely, 2^620124649 is an apocalyptic number.

It is an amenable number.

620124649 is a deficient number, since it is larger than the sum of its proper divisors (1).

620124649 is an equidigital number, since it uses as much as digits as its factorization.

620124649 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 34.

The square root of 620124649 is about 24902.3020823377. The cubic root of 620124649 is about 852.7590388210.

The spelling of 620124649 in words is "six hundred twenty million, one hundred twenty-four thousand, six hundred forty-nine".