220663873 has 4 divisors (see below), whose sum is σ = 221443888. Its totient is φ = 219883860.

The previous prime is 220663843. The next prime is 220663931. The reversal of 220663873 is 378366022.

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 220663873 - 2²⁵ = 187109441 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (220663823) 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, 389583 + ... + 390148.

It is an arithmetic number, because the mean of its divisors is an integer number (55360972).

Almost surely, 2^220663873 is an apocalyptic number.

It is an amenable number.

220663873 is a deficient number, since it is larger than the sum of its proper divisors (780015).

220663873 is an equidigital number, since it uses as much as digits as its factorization.

220663873 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 780014.

The product of its (nonzero) digits is 72576, while the sum is 37.

The square root of 220663873 is about 14854.7592710215. The cubic root of 220663873 is about 604.2876874988.

The spelling of 220663873 in words is "two hundred twenty million, six hundred sixty-three thousand, eight hundred seventy-three".