621980211 has 4 divisors (see below), whose sum is σ = 829306952. Its totient is φ = 414653472.

The previous prime is 621980201. The next prime is 621980213. The reversal of 621980211 is 112089126.

It is a happy number.

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

It is not a de Polignac number, because 621980211 - 2¹¹ = 621978163 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (621980213) 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, 103663366 + ... + 103663371.

It is an arithmetic number, because the mean of its divisors is an integer number (207326738).

Almost surely, 2^621980211 is an apocalyptic number.

621980211 is a deficient number, since it is larger than the sum of its proper divisors (207326741).

621980211 is a wasteful number, since it uses less digits than its factorization.

621980211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 207326740.

The product of its (nonzero) digits is 1728, while the sum is 30.

The square root of 621980211 is about 24939.5310902190. The cubic root of 621980211 is about 853.6087452116.

The spelling of 621980211 in words is "six hundred twenty-one million, nine hundred eighty thousand, two hundred eleven".