201312439 has 2 divisors, whose sum is σ = 201312440. Its totient is φ = 201312438.

The previous prime is 201312437. The next prime is 201312451. The reversal of 201312439 is 934213102.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 201312439 - 2¹ = 201312437 is a prime.

It is a super-2 number, since 2×201312439² = 81053396192257442, which contains 22 as substring.

Together with 201312437, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (201312431) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 100656219 + 100656220.

It is an arithmetic number, because the mean of its divisors is an integer number (100656220).

Almost surely, 2^201312439 is an apocalyptic number.

201312439 is a deficient number, since it is larger than the sum of its proper divisors (1).

201312439 is an equidigital number, since it uses as much as digits as its factorization.

201312439 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1296, while the sum is 25.

The square root of 201312439 is about 14188.4614740288. The cubic root of 201312439 is about 586.0799579884.

The spelling of 201312439 in words is "two hundred one million, three hundred twelve thousand, four hundred thirty-nine".