620267621 has 4 divisors (see below), whose sum is σ = 620320044. Its totient is φ = 620215200.

The previous prime is 620267617. The next prime is 620267651. The reversal of 620267621 is 126762026.

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 40132225 + 580135396 = 6335^2 + 24086^2 .

It is a cyclic number.

It is not a de Polignac number, because 620267621 - 2² = 620267617 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (620267651) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 851 + ... + 35231.

It is an arithmetic number, because the mean of its divisors is an integer number (155080011).

Almost surely, 2^620267621 is an apocalyptic number.

It is an amenable number.

620267621 is a deficient number, since it is larger than the sum of its proper divisors (52423).

620267621 is a wasteful number, since it uses less digits than its factorization.

620267621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 52422.

The product of its (nonzero) digits is 12096, while the sum is 32.

The square root of 620267621 is about 24905.1725751901. The cubic root of 620267621 is about 852.8245693543.

The spelling of 620267621 in words is "six hundred twenty million, two hundred sixty-seven thousand, six hundred twenty-one".