201640109 has 8 divisors (see below), whose sum is σ = 222028128. Its totient is φ = 181594960.

The previous prime is 201640079. The next prime is 201640123. The reversal of 201640109 is 901046102.

It is a happy number.

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 201640109 - 2⁸ = 201639853 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (201640169) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 84482 + ... + 86835.

It is an arithmetic number, because the mean of its divisors is an integer number (27753516).

Almost surely, 2^201640109 is an apocalyptic number.

It is an amenable number.

201640109 is a deficient number, since it is larger than the sum of its proper divisors (20388019).

201640109 is a wasteful number, since it uses less digits than its factorization.

201640109 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 171435.

The product of its (nonzero) digits is 432, while the sum is 23.

The square root of 201640109 is about 14200.0038380277. The cubic root of 201640109 is about 586.3977669986.

The spelling of 201640109 in words is "two hundred one million, six hundred forty thousand, one hundred nine".