220969 has 4 divisors (see below), whose sum is σ = 252544. Its totient is φ = 189396.

The previous prime is 220939. The next prime is 220973. The reversal of 220969 is 969022.

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 220969 - 2⁷ = 220841 is a prime.

It is a super-2 number, since 2×220969² = 97654597922, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (220919) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 15777 + ... + 15790.

It is an arithmetic number, because the mean of its divisors is an integer number (63136).

2²²⁰⁹⁶⁹ is an apocalyptic number.

It is an amenable number.

220969 is a deficient number, since it is larger than the sum of its proper divisors (31575).

220969 is an equidigital number, since it uses as much as digits as its factorization.

220969 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31574.

The product of its (nonzero) digits is 1944, while the sum is 28.

The square root of 220969 is about 470.0733985241. The cubic root of 220969 is about 60.4566089161.

It can be divided in two parts, 2209 and 69, that added together give a triangular number (2278 = T₆₇).

The spelling of 220969 in words is "two hundred twenty thousand, nine hundred sixty-nine".