223705409 has 2 divisors, whose sum is σ = 223705410. Its totient is φ = 223705408.

The previous prime is 223705381. The next prime is 223705439. The reversal of 223705409 is 904507322.

It is a happy number.

223705409 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 210163009 + 13542400 = 14497^2 + 3680^2 .

It is a cyclic number.

It is not a de Polignac number, because 223705409 - 2¹⁶ = 223639873 is a prime.

It is a super-2 number, since 2×223705409² = 100088220031714562, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (223705439) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 111852704 + 111852705.

It is an arithmetic number, because the mean of its divisors is an integer number (111852705).

Almost surely, 2^223705409 is an apocalyptic number.

It is an amenable number.

223705409 is a deficient number, since it is larger than the sum of its proper divisors (1).

223705409 is an equidigital number, since it uses as much as digits as its factorization.

223705409 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 15120, while the sum is 32.

The square root of 223705409 is about 14956.7847146370. The cubic root of 223705409 is about 607.0514419282.

The spelling of 223705409 in words is "two hundred twenty-three million, seven hundred five thousand, four hundred nine".