220404409 has 2 divisors, whose sum is σ = 220404410. Its totient is φ = 220404408.

The previous prime is 220404347. The next prime is 220404413. The reversal of 220404409 is 904404022.

220404409 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 220077225 + 327184 = 14835^2 + 572^2 .

It is a cyclic number.

It is not a de Polignac number, because 220404409 - 2¹⁷ = 220273337 is a prime.

It is not a weakly prime, because it can be changed into another prime (220404209) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110202204 + 110202205.

It is an arithmetic number, because the mean of its divisors is an integer number (110202205).

Almost surely, 2^220404409 is an apocalyptic number.

It is an amenable number.

220404409 is a deficient number, since it is larger than the sum of its proper divisors (1).

220404409 is an equidigital number, since it uses as much as digits as its factorization.

220404409 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2304, while the sum is 25.

The square root of 220404409 is about 14846.0233396018. The cubic root of 220404409 is about 604.0507473479.

The spelling of 220404409 in words is "two hundred twenty million, four hundred four thousand, four hundred nine".