621608433 has 16 divisors (see below), whose sum is σ = 845311680. Its totient is φ = 406171584.

The previous prime is 621608413. The next prime is 621608441. The reversal of 621608433 is 334806126.

It is not a de Polignac number, because 621608433 - 2¹⁰ = 621607409 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 621608394 and 621608403.

It is not an unprimeable number, because it can be changed into a prime (621608413) 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 15 ways as a sum of consecutive naturals, for example, 272823 + ... + 275091.

It is an arithmetic number, because the mean of its divisors is an integer number (52831980).

Almost surely, 2^621608433 is an apocalyptic number.

It is an amenable number.

621608433 is a deficient number, since it is larger than the sum of its proper divisors (223703247).

621608433 is a wasteful number, since it uses less digits than its factorization.

621608433 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4048.

The product of its (nonzero) digits is 20736, while the sum is 33.

The square root of 621608433 is about 24932.0763876577. The cubic root of 621608433 is about 853.4386346527.

The spelling of 621608433 in words is "six hundred twenty-one million, six hundred eight thousand, four hundred thirty-three".