201720013 has 8 divisors (see below), whose sum is σ = 222531840. Its totient is φ = 181320480.

The previous prime is 201719989. The next prime is 201720047. The reversal of 201720013 is 310027102.

It is a happy number.

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

It is not a de Polignac number, because 201720013 - 2¹³ = 201711821 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 (201720073) 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, 102045 + ... + 104002.

It is an arithmetic number, because the mean of its divisors is an integer number (27816480).

Almost surely, 2^201720013 is an apocalyptic number.

It is an amenable number.

201720013 is a deficient number, since it is larger than the sum of its proper divisors (20811827).

201720013 is a wasteful number, since it uses less digits than its factorization.

201720013 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 206147.

The product of its (nonzero) digits is 84, while the sum is 16.

The square root of 201720013 is about 14202.8170797205. The cubic root of 201720013 is about 586.4752141223.

Adding to 201720013 its reverse (310027102), we get a palindrome (511747115).

The spelling of 201720013 in words is "two hundred one million, seven hundred twenty thousand, thirteen".