220709867 has 8 divisors (see below), whose sum is σ = 257388000. Its totient is φ = 189179592.

The previous prime is 220709851. The next prime is 220709887. The reversal of 220709867 is 768907022.

It is not a de Polignac number, because 220709867 - 2⁴ = 220709851 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (220709837) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 321392 + ... + 322077.

It is an arithmetic number, because the mean of its divisors is an integer number (32173500).

Almost surely, 2^220709867 is an apocalyptic number.

220709867 is a deficient number, since it is larger than the sum of its proper divisors (36678133).

220709867 is an frugal number, since it uses more digits than its factorization.

220709867 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 643490 (or 643476 counting only the distinct ones).

The product of its (nonzero) digits is 84672, while the sum is 41.

The square root of 220709867 is about 14856.3073137304. The cubic root of 220709867 is about 604.3296694156.

The spelling of 220709867 in words is "two hundred twenty million, seven hundred nine thousand, eight hundred sixty-seven".