620464613 has 2 divisors, whose sum is σ = 620464614. Its totient is φ = 620464612.

The previous prime is 620464609. The next prime is 620464651. The reversal of 620464613 is 316464026.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 503867809 + 116596804 = 22447^2 + 10798^2 .

It is a cyclic number.

It is not a de Polignac number, because 620464613 - 2² = 620464609 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 620464613.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (620454613) 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, 310232306 + 310232307.

It is an arithmetic number, because the mean of its divisors is an integer number (310232307).

Almost surely, 2^620464613 is an apocalyptic number.

It is an amenable number.

620464613 is a deficient number, since it is larger than the sum of its proper divisors (1).

620464613 is an equidigital number, since it uses as much as digits as its factorization.

620464613 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 32.

The square root of 620464613 is about 24909.1271023294. The cubic root of 620464613 is about 852.9148432027.

The spelling of 620464613 in words is "six hundred twenty million, four hundred sixty-four thousand, six hundred thirteen".