223493279 has 2 divisors, whose sum is σ = 223493280. Its totient is φ = 223493278.

The previous prime is 223493251. The next prime is 223493287. The reversal of 223493279 is 972394322.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-223493279 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (223493299) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 111746639 + 111746640.

It is an arithmetic number, because the mean of its divisors is an integer number (111746640).

Almost surely, 2^223493279 is an apocalyptic number.

223493279 is a deficient number, since it is larger than the sum of its proper divisors (1).

223493279 is an equidigital number, since it uses as much as digits as its factorization.

223493279 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 223493279 is about 14949.6916021703. The cubic root of 223493279 is about 606.8595011850.

The spelling of 223493279 in words is "two hundred twenty-three million, four hundred ninety-three thousand, two hundred seventy-nine".