239644423 has 2 divisors, whose sum is σ = 239644424. Its totient is φ = 239644422.

The previous prime is 239644403. The next prime is 239644441. The reversal of 239644423 is 324446932.

239644423 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-239644423 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (239644403) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 119822211 + 119822212.

It is an arithmetic number, because the mean of its divisors is an integer number (119822212).

Almost surely, 2^239644423 is an apocalyptic number.

239644423 is a deficient number, since it is larger than the sum of its proper divisors (1).

239644423 is an equidigital number, since it uses as much as digits as its factorization.

239644423 is an evil number, because the sum of its binary digits is even.

The product of its digits is 124416, while the sum is 37.

The square root of 239644423 is about 15480.4529326503. The cubic root of 239644423 is about 621.1394438282.

The spelling of 239644423 in words is "two hundred thirty-nine million, six hundred forty-four thousand, four hundred twenty-three".