201253439 has 2 divisors, whose sum is σ = 201253440. Its totient is φ = 201253438.

The previous prime is 201253399. The next prime is 201253489. The reversal of 201253439 is 934352102.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-201253439 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 (201253489) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 100626719 + 100626720.

It is an arithmetic number, because the mean of its divisors is an integer number (100626720).

Almost surely, 2^201253439 is an apocalyptic number.

201253439 is a deficient number, since it is larger than the sum of its proper divisors (1).

201253439 is an equidigital number, since it uses as much as digits as its factorization.

201253439 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6480, while the sum is 29.

The square root of 201253439 is about 14186.3821674168. The cubic root of 201253439 is about 586.0226969197.

The spelling of 201253439 in words is "two hundred one million, two hundred fifty-three thousand, four hundred thirty-nine".