620741305 has 12 divisors (see below), whose sum is σ = 786159972. Its totient is φ = 470455200.

The previous prime is 620741299. The next prime is 620741309. The reversal of 620741305 is 503147026.

It can be written as a sum of positive squares in 2 ways, for example, as 236267641 + 384473664 = 15371^2 + 19608^2 .

It is not a de Polignac number, because 620741305 - 2¹⁷ = 620610233 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (620741309) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 170146 + ... + 173755.

It is an arithmetic number, because the mean of its divisors is an integer number (65513331).

Almost surely, 2^620741305 is an apocalyptic number.

It is an amenable number.

620741305 is a deficient number, since it is larger than the sum of its proper divisors (165418667).

620741305 is a wasteful number, since it uses less digits than its factorization.

620741305 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 343944 (or 343925 counting only the distinct ones).

The product of its (nonzero) digits is 5040, while the sum is 28.

The square root of 620741305 is about 24914.6805116983. The cubic root of 620741305 is about 853.0416082308.

The spelling of 620741305 in words is "six hundred twenty million, seven hundred forty-one thousand, three hundred five".