201309247 has 2 divisors, whose sum is σ = 201309248. Its totient is φ = 201309246.

The previous prime is 201309209. The next prime is 201309263. The reversal of 201309247 is 742903102.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 201309247 - 2¹¹ = 201307199 is a 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 (201309287) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 100654623 + 100654624.

It is an arithmetic number, because the mean of its divisors is an integer number (100654624).

Almost surely, 2^201309247 is an apocalyptic number.

201309247 is a deficient number, since it is larger than the sum of its proper divisors (1).

201309247 is an equidigital number, since it uses as much as digits as its factorization.

201309247 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3024, while the sum is 28.

The square root of 201309247 is about 14188.3489878139. The cubic root of 201309247 is about 586.0768603538.

The spelling of 201309247 in words is "two hundred one million, three hundred nine thousand, two hundred forty-seven".