22003409 has 2 divisors, whose sum is σ = 22003410. Its totient is φ = 22003408.

The previous prime is 22003363. The next prime is 22003411. The reversal of 22003409 is 90430022.

22003409 is nontrivially palindromic in base 8.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 20502784 + 1500625 = 4528^2 + 1225^2 .

It is a cyclic number.

It is not a de Polignac number, because 22003409 - 2¹⁶ = 21937873 is a prime.

Together with 22003411, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (22003439) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11001704 + 11001705.

It is an arithmetic number, because the mean of its divisors is an integer number (11001705).

Almost surely, 2^22003409 is an apocalyptic number.

It is an amenable number.

22003409 is a deficient number, since it is larger than the sum of its proper divisors (1).

22003409 is an equidigital number, since it uses as much as digits as its factorization.

22003409 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 432, while the sum is 20.

The square root of 22003409 is about 4690.7791463679. The cubic root of 22003409 is about 280.2184052757.

The spelling of 22003409 in words is "twenty-two million, three thousand, four hundred nine".