220474979 has 4 divisors (see below), whose sum is σ = 225165984. Its totient is φ = 215783976.

The previous prime is 220474973. The next prime is 220474981. The reversal of 220474979 is 979474022.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 220474979 - 2¹² = 220470883 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (220474973) 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 in 3 ways as a sum of consecutive naturals, for example, 2345432 + ... + 2345525.

It is an arithmetic number, because the mean of its divisors is an integer number (56291496).

Almost surely, 2^220474979 is an apocalyptic number.

220474979 is a deficient number, since it is larger than the sum of its proper divisors (4691005).

220474979 is an equidigital number, since it uses as much as digits as its factorization.

220474979 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4691004.

The product of its (nonzero) digits is 254016, while the sum is 44.

The square root of 220474979 is about 14848.3998801218. The cubic root of 220474979 is about 604.1152096283.

The spelling of 220474979 in words is "two hundred twenty million, four hundred seventy-four thousand, nine hundred seventy-nine".