621329 has 4 divisors (see below), whose sum is σ = 631920. Its totient is φ = 610740.

The previous prime is 621317. The next prime is 621337. The reversal of 621329 is 923126.

621329 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 621329 - 2¹² = 617233 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (621359) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5207 + ... + 5324.

It is an arithmetic number, because the mean of its divisors is an integer number (157980).

2⁶²¹³²⁹ is an apocalyptic number.

It is an amenable number.

621329 is a deficient number, since it is larger than the sum of its proper divisors (10591).

621329 is a wasteful number, since it uses less digits than its factorization.

621329 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10590.

The product of its digits is 648, while the sum is 23.

The square root of 621329 is about 788.2442514855. The cubic root of 621329 is about 85.3310732773.

The spelling of 621329 in words is "six hundred twenty-one thousand, three hundred twenty-nine".