220469 has 2 divisors, whose sum is σ = 220470. Its totient is φ = 220468.

The previous prime is 220447. The next prime is 220471. The reversal of 220469 is 964022.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 122500 + 97969 = 350^2 + 313^2 .

It is a cyclic number.

It is not a de Polignac number, because 220469 - 2¹² = 216373 is a prime.

It is a super-2 number, since 2×220469² = 97213159922, which contains 22 as substring.

It is a Sophie Germain prime.

Together with 220471, it forms a pair of twin primes.

It is a Chen prime.

It is a Curzon number.

It is equal to p₁₉₆₅₂ and since 220469 and 19652 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 220469.

It is not a weakly prime, because it can be changed into another prime (220169) 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 as a sum of consecutive naturals, namely, 110234 + 110235.

It is an arithmetic number, because the mean of its divisors is an integer number (110235).

2²²⁰⁴⁶⁹ is an apocalyptic number.

It is an amenable number.

220469 is a deficient number, since it is larger than the sum of its proper divisors (1).

220469 is an equidigital number, since it uses as much as digits as its factorization.

220469 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 864, while the sum is 23.

The square root of 220469 is about 469.5412654922. The cubic root of 220469 is about 60.4109748635.

It can be divided in two parts, 2204 and 69, that multiplied together give a triangular number (152076 = T₅₅₁).

The spelling of 220469 in words is "two hundred twenty thousand, four hundred sixty-nine".