220879 has 2 divisors, whose sum is σ = 220880. Its totient is φ = 220878.

The previous prime is 220877. The next prime is 220889. The reversal of 220879 is 978022.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 220879 - 2¹ = 220877 is a prime.

Together with 220877, it forms a pair of twin primes.

It is an Ulam number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (220873) 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 as a sum of consecutive naturals, namely, 110439 + 110440.

It is an arithmetic number, because the mean of its divisors is an integer number (110440).

2²²⁰⁸⁷⁹ is an apocalyptic number.

220879 is a deficient number, since it is larger than the sum of its proper divisors (1).

220879 is an equidigital number, since it uses as much as digits as its factorization.

220879 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2016, while the sum is 28.

The square root of 220879 is about 469.9776590435. The cubic root of 220879 is about 60.4483998707.

The spelling of 220879 in words is "two hundred twenty thousand, eight hundred seventy-nine".