223947329 has 2 divisors, whose sum is σ = 223947330. Its totient is φ = 223947328.

The previous prime is 223947323. The next prime is 223947337. The reversal of 223947329 is 923749322.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 200279104 + 23668225 = 14152^2 + 4865^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-223947329 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (223947323) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 111973664 + 111973665.

It is an arithmetic number, because the mean of its divisors is an integer number (111973665).

Almost surely, 2^223947329 is an apocalyptic number.

It is an amenable number.

223947329 is a deficient number, since it is larger than the sum of its proper divisors (1).

223947329 is an equidigital number, since it uses as much as digits as its factorization.

223947329 is an evil number, because the sum of its binary digits is even.

The product of its digits is 163296, while the sum is 41.

The square root of 223947329 is about 14964.8698290363. The cubic root of 223947329 is about 607.2701894003.

The spelling of 223947329 in words is "two hundred twenty-three million, nine hundred forty-seven thousand, three hundred twenty-nine".