223404389 has 8 divisors (see below), whose sum is σ = 241183320. Its totient is φ = 205710336.

The previous prime is 223404373. The next prime is 223404397. The reversal of 223404389 is 983404322.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 11847364 + 211557025 = 3442^2 + 14545^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 223404389 - 2⁴ = 223404373 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (223404319) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 15692 + ... + 26325.

It is an arithmetic number, because the mean of its divisors is an integer number (30147915).

Almost surely, 2^223404389 is an apocalyptic number.

It is an amenable number.

223404389 is a deficient number, since it is larger than the sum of its proper divisors (17778931).

223404389 is a wasteful number, since it uses less digits than its factorization.

223404389 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42439.

The product of its (nonzero) digits is 41472, while the sum is 35.

The square root of 223404389 is about 14946.7183354742. The cubic root of 223404389 is about 606.7790350899.

The spelling of 223404389 in words is "two hundred twenty-three million, four hundred four thousand, three hundred eighty-nine".