621313329 has 64 divisors (see below), whose sum is σ = 1084575744. Its totient is φ = 307397376.

The previous prime is 621313309. The next prime is 621313339. The reversal of 621313329 is 923313126.

It is not a de Polignac number, because 621313329 - 2⁹ = 621312817 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 621313296 and 621313305.

It is not an unprimeable number, because it can be changed into a prime (621313309) 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 63 ways as a sum of consecutive naturals, for example, 331854 + ... + 333720.

It is an arithmetic number, because the mean of its divisors is an integer number (16946496).

Almost surely, 2^621313329 is an apocalyptic number.

621313329 is a gapful number since it is divisible by the number (69) formed by its first and last digit.

It is an amenable number.

621313329 is a deficient number, since it is larger than the sum of its proper divisors (463262415).

621313329 is a wasteful number, since it uses less digits than its factorization.

621313329 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1966.

The product of its digits is 5832, while the sum is 30.

The square root of 621313329 is about 24926.1575257800. The cubic root of 621313329 is about 853.3035587179.

The spelling of 621313329 in words is "six hundred twenty-one million, three hundred thirteen thousand, three hundred twenty-nine".