201382109 has 2 divisors, whose sum is σ = 201382110. Its totient is φ = 201382108.

The previous prime is 201382091. The next prime is 201382151. The reversal of 201382109 is 901283102.

Together with previous prime (201382091) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 141086884 + 60295225 = 11878^2 + 7765^2 .

It is a cyclic number.

It is not a de Polignac number, because 201382109 - 2²⁰ = 200333533 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (201382189) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 100691054 + 100691055.

It is an arithmetic number, because the mean of its divisors is an integer number (100691055).

Almost surely, 2^201382109 is an apocalyptic number.

It is an amenable number.

201382109 is a deficient number, since it is larger than the sum of its proper divisors (1).

201382109 is an equidigital number, since it uses as much as digits as its factorization.

201382109 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 864, while the sum is 26.

The square root of 201382109 is about 14190.9164256576. The cubic root of 201382109 is about 586.1475601716.

The spelling of 201382109 in words is "two hundred one million, three hundred eighty-two thousand, one hundred nine".