223638839 has 2 divisors, whose sum is σ = 223638840. Its totient is φ = 223638838.

The previous prime is 223638781. The next prime is 223638847. The reversal of 223638839 is 938836322.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-223638839 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 223638839.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (223638439) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 111819419 + 111819420.

It is an arithmetic number, because the mean of its divisors is an integer number (111819420).

Almost surely, 2^223638839 is an apocalyptic number.

223638839 is a deficient number, since it is larger than the sum of its proper divisors (1).

223638839 is an equidigital number, since it uses as much as digits as its factorization.

223638839 is an evil number, because the sum of its binary digits is even.

The product of its digits is 373248, while the sum is 44.

The square root of 223638839 is about 14954.5591376008. The cubic root of 223638839 is about 606.9912207295.

The spelling of 223638839 in words is "two hundred twenty-three million, six hundred thirty-eight thousand, eight hundred thirty-nine".