220849009 has 2 divisors, whose sum is σ = 220849010. Its totient is φ = 220849008.

The previous prime is 220848941. The next prime is 220849019. The reversal of 220849009 is 900948022.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 219632400 + 1216609 = 14820^2 + 1103^2 .

It is a cyclic number.

It is not a de Polignac number, because 220849009 - 2¹¹ = 220846961 is a prime.

It is not a weakly prime, because it can be changed into another prime (220849019) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110424504 + 110424505.

It is an arithmetic number, because the mean of its divisors is an integer number (110424505).

Almost surely, 2^220849009 is an apocalyptic number.

It is an amenable number.

220849009 is a deficient number, since it is larger than the sum of its proper divisors (1).

220849009 is an equidigital number, since it uses as much as digits as its factorization.

220849009 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 10368, while the sum is 34.

The square root of 220849009 is about 14860.9895027215. The cubic root of 220849009 is about 604.4566384779.

The spelling of 220849009 in words is "two hundred twenty million, eight hundred forty-nine thousand, nine".