220929 has 4 divisors (see below), whose sum is σ = 294576. Its totient is φ = 147284.

The previous prime is 220919. The next prime is 220931. The reversal of 220929 is 929022.

220929 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 220929 - 2⁵ = 220897 is a prime.

It is a D-number.

It is a junction number, because it is equal to n+sod(n) for n = 220899 and 220908.

It is not an unprimeable number, because it can be changed into a prime (220919) 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, 36819 + ... + 36824.

It is an arithmetic number, because the mean of its divisors is an integer number (73644).

2²²⁰⁹²⁹ is an apocalyptic number.

It is an amenable number.

220929 is a deficient number, since it is larger than the sum of its proper divisors (73647).

220929 is an equidigital number, since it uses as much as digits as its factorization.

220929 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 73646.

The product of its (nonzero) digits is 648, while the sum is 24.

The square root of 220929 is about 470.0308500514. The cubic root of 220929 is about 60.4529607268.

The spelling of 220929 in words is "two hundred twenty thousand, nine hundred twenty-nine".