621483409 has 8 divisors (see below), whose sum is σ = 625335552. Its totient is φ = 617640240.

The previous prime is 621483367. The next prime is 621483431. The reversal of 621483409 is 904384126.

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 621483409 - 2⁷ = 621483281 is a prime.

It is a super-2 number, since 2×621483409² = 772483255324522562, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (621483439) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 180387 + ... + 183799.

It is an arithmetic number, because the mean of its divisors is an integer number (78166944).

Almost surely, 2^621483409 is an apocalyptic number.

It is an amenable number.

621483409 is a deficient number, since it is larger than the sum of its proper divisors (3852143).

621483409 is a wasteful number, since it uses less digits than its factorization.

621483409 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4487.

The product of its (nonzero) digits is 41472, while the sum is 37.

The square root of 621483409 is about 24929.5689693986. The cubic root of 621483409 is about 853.3814134930.

The spelling of 621483409 in words is "six hundred twenty-one million, four hundred eighty-three thousand, four hundred nine".