621306445 has 8 divisors (see below), whose sum is σ = 756069120. Its totient is φ = 490044240.

The previous prime is 621306421. The next prime is 621306451. The reversal of 621306445 is 544603126.

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

It is not a de Polignac number, because 621306445 - 2⁷ = 621306317 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 874725 + ... + 875434.

It is an arithmetic number, because the mean of its divisors is an integer number (94508640).

Almost surely, 2^621306445 is an apocalyptic number.

It is an amenable number.

621306445 is a deficient number, since it is larger than the sum of its proper divisors (134762675).

621306445 is a wasteful number, since it uses less digits than its factorization.

621306445 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1750235.

The product of its (nonzero) digits is 17280, while the sum is 31.

The square root of 621306445 is about 24926.0194375275. The cubic root of 621306445 is about 853.3004072412.

The spelling of 621306445 in words is "six hundred twenty-one million, three hundred six thousand, four hundred forty-five".