201109091 has 8 divisors (see below), whose sum is σ = 211983120. Its totient is φ = 190264032.

The previous prime is 201109081. The next prime is 201109109. The reversal of 201109091 is 190901102.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 201109091 - 2¹⁴ = 201092707 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (201109081) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7841 + ... + 21533.

It is an arithmetic number, because the mean of its divisors is an integer number (26497890).

Almost surely, 2^201109091 is an apocalyptic number.

201109091 is a deficient number, since it is larger than the sum of its proper divisors (10874029).

201109091 is a wasteful number, since it uses less digits than its factorization.

201109091 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14485.

The product of its (nonzero) digits is 162, while the sum is 23.

The square root of 201109091 is about 14181.2936998005. The cubic root of 201109091 is about 585.8825561484.

The spelling of 201109091 in words is "two hundred one million, one hundred nine thousand, ninety-one".