223369409 has 4 divisors (see below), whose sum is σ = 236508804. Its totient is φ = 210230016.

The previous prime is 223369403. The next prime is 223369417. The reversal of 223369409 is 904963322.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 904963322 = 2 ⋅452481661.

It can be written as a sum of positive squares in 2 ways, for example, as 175483009 + 47886400 = 13247^2 + 6920^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-223369409 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (223369403) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6569672 + ... + 6569705.

It is an arithmetic number, because the mean of its divisors is an integer number (59127201).

Almost surely, 2^223369409 is an apocalyptic number.

It is an amenable number.

223369409 is a deficient number, since it is larger than the sum of its proper divisors (13139395).

223369409 is a wasteful number, since it uses less digits than its factorization.

223369409 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13139394.

The product of its (nonzero) digits is 69984, while the sum is 38.

The square root of 223369409 is about 14945.5481331398. The cubic root of 223369409 is about 606.7473642133.

The spelling of 223369409 in words is "two hundred twenty-three million, three hundred sixty-nine thousand, four hundred nine".