201000109 has 2 divisors, whose sum is σ = 201000110. Its totient is φ = 201000108.

The previous prime is 201000091. The next prime is 201000119. The reversal of 201000109 is 901000102.

Together with previous prime (201000091) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 184009225 + 16990884 = 13565^2 + 4122^2 .

It is a cyclic number.

It is not a de Polignac number, because 201000109 - 2¹⁵ = 200967341 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (201000119) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 100500054 + 100500055.

It is an arithmetic number, because the mean of its divisors is an integer number (100500055).

Almost surely, 2^201000109 is an apocalyptic number.

It is an amenable number.

201000109 is a deficient number, since it is larger than the sum of its proper divisors (1).

201000109 is an equidigital number, since it uses as much as digits as its factorization.

201000109 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 18, while the sum is 13.

The square root of 201000109 is about 14177.4507228909. The cubic root of 201000109 is about 585.7767061517.

The spelling of 201000109 in words is "two hundred one million, one hundred nine", and thus it is an aban number.