620456221 has 8 divisors (see below), whose sum is σ = 773555904. Its totient is φ = 483472320.

The previous prime is 620456203. The next prime is 620456233. The reversal of 620456221 is 122654026.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 620456221 - 2⁷ = 620456093 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 620456221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (620456201) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4028860 + ... + 4029013.

It is an arithmetic number, because the mean of its divisors is an integer number (96694488).

Almost surely, 2^620456221 is an apocalyptic number.

It is an amenable number.

620456221 is a deficient number, since it is larger than the sum of its proper divisors (153099683).

620456221 is a wasteful number, since it uses less digits than its factorization.

620456221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8057891.

The product of its (nonzero) digits is 5760, while the sum is 28.

The square root of 620456221 is about 24908.9586494498. The cubic root of 620456221 is about 852.9109978619.

The spelling of 620456221 in words is "six hundred twenty million, four hundred fifty-six thousand, two hundred twenty-one".