201223439 has 2 divisors, whose sum is σ = 201223440. Its totient is φ = 201223438.

The previous prime is 201223397. The next prime is 201223487. The reversal of 201223439 is 934322102.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-201223439 is a prime.

It is a Sophie Germain 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 (201225439) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 100611719 + 100611720.

It is an arithmetic number, because the mean of its divisors is an integer number (100611720).

Almost surely, 2^201223439 is an apocalyptic number.

201223439 is a deficient number, since it is larger than the sum of its proper divisors (1).

201223439 is an equidigital number, since it uses as much as digits as its factorization.

201223439 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2592, while the sum is 26.

The square root of 201223439 is about 14185.3247759789. The cubic root of 201223439 is about 585.9935768301.

The spelling of 201223439 in words is "two hundred one million, two hundred twenty-three thousand, four hundred thirty-nine".