201990017 has 8 divisors (see below), whose sum is σ = 215696640. Its totient is φ = 188732880.

The previous prime is 201990011. The next prime is 201990029. The reversal of 201990017 is 710099102.

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 201990017 - 2⁸ = 201989761 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (29).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (201990011) 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, 111443 + ... + 113240.

It is an arithmetic number, because the mean of its divisors is an integer number (26962080).

Almost surely, 2^201990017 is an apocalyptic number.

It is an amenable number.

201990017 is a deficient number, since it is larger than the sum of its proper divisors (13706623).

201990017 is a wasteful number, since it uses less digits than its factorization.

201990017 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 224743.

The product of its (nonzero) digits is 1134, while the sum is 29.

The square root of 201990017 is about 14212.3191984982. The cubic root of 201990017 is about 586.7367648606.

The spelling of 201990017 in words is "two hundred one million, nine hundred ninety thousand, seventeen".