201212839 has 2 divisors, whose sum is σ = 201212840. Its totient is φ = 201212838.

The previous prime is 201212827. The next prime is 201212849. The reversal of 201212839 is 938212102.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 201212839 - 2¹¹ = 201210791 is a prime.

It is a Chen prime.

It is equal to p_11142469 and since 201212839 and 11142469 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (201212819) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 100606419 + 100606420.

It is an arithmetic number, because the mean of its divisors is an integer number (100606420).

Almost surely, 2^201212839 is an apocalyptic number.

201212839 is a deficient number, since it is larger than the sum of its proper divisors (1).

201212839 is an equidigital number, since it uses as much as digits as its factorization.

201212839 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1728, while the sum is 28.

The square root of 201212839 is about 14184.9511454922. The cubic root of 201212839 is about 585.9832870398.

The spelling of 201212839 in words is "two hundred one million, two hundred twelve thousand, eight hundred thirty-nine".