620601613 has 4 divisors (see below), whose sum is σ = 620672220. Its totient is φ = 620531008.

The previous prime is 620601607. The next prime is 620601623. The reversal of 620601613 is 316106026.

620601613 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 233417284 + 387184329 = 15278^2 + 19677^2 .

It is a cyclic number.

It is not a de Polignac number, because 620601613 - 2⁵ = 620601581 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (620601623) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 19870 + ... + 40447.

It is an arithmetic number, because the mean of its divisors is an integer number (155168055).

Almost surely, 2^620601613 is an apocalyptic number.

It is an amenable number.

620601613 is a deficient number, since it is larger than the sum of its proper divisors (70607).

620601613 is a wasteful number, since it uses less digits than its factorization.

620601613 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 70606.

The product of its (nonzero) digits is 1296, while the sum is 25.

The square root of 620601613 is about 24911.8769465490. The cubic root of 620601613 is about 852.9776137631.

Adding to 620601613 its reverse (316106026), we get a palindrome (936707639).

The spelling of 620601613 in words is "six hundred twenty million, six hundred one thousand, six hundred thirteen".