620880221 has 4 divisors (see below), whose sum is σ = 668640252. Its totient is φ = 573120192.

The previous prime is 620880191. The next prime is 620880263. The reversal of 620880221 is 122088026.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 346480996 + 274399225 = 18614^2 + 16565^2 .

It is a cyclic number.

It is not a de Polignac number, because 620880221 - 2¹⁰ = 620879197 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 (620880721) 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, 23879996 + ... + 23880021.

It is an arithmetic number, because the mean of its divisors is an integer number (167160063).

Almost surely, 2^620880221 is an apocalyptic number.

It is an amenable number.

620880221 is a deficient number, since it is larger than the sum of its proper divisors (47760031).

620880221 is a wasteful number, since it uses less digits than its factorization.

620880221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 47760030.

The product of its (nonzero) digits is 3072, while the sum is 29.

The square root of 620880221 is about 24917.4681900068. The cubic root of 620880221 is about 853.1052376840.

The spelling of 620880221 in words is "six hundred twenty million, eight hundred eighty thousand, two hundred twenty-one".