620050729489 has 3 divisors (see below), whose sum is σ = 620051516923. Its totient is φ = 620049942056.

The previous prime is 620050729483. The next prime is 620050729523. The reversal of 620050729489 is 984927050026.

The square root of 620050729489 is 787433.

It is a perfect power (a square), and thus also a powerful number.

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 only one way, i.e., 595899083025 + 24151646464 = 771945^2 + 155408^2 .

It is not a de Polignac number, because 620050729489 - 2¹¹ = 620050727441 is a prime.

It is a super-2 number, since 2×620050729489² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (620050729483) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 393717 + ... + 1181149.

Almost surely, 2^620050729489 is an apocalyptic number.

620050729489 is the 787433-rd square number.

620050729489 is the 393717-th centered octagonal number.

It is an amenable number.

620050729489 is a deficient number, since it is larger than the sum of its proper divisors (787434).

620050729489 is an frugal number, since it uses more digits than its factorization.

620050729489 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1574866 (or 787433 counting only the distinct ones).

The product of its (nonzero) digits is 2177280, while the sum is 52.

The spelling of 620050729489 in words is "six hundred twenty billion, fifty million, seven hundred twenty-nine thousand, four hundred eighty-nine".