201930017 has 4 divisors (see below), whose sum is σ = 202192020. Its totient is φ = 201668016.

The previous prime is 201930013. The next prime is 201930019. The reversal of 201930017 is 710039102.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 81018001 + 120912016 = 9001^2 + 10996^2 .

It is a cyclic number.

It is not a de Polignac number, because 201930017 - 2² = 201930013 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 201929974 and 201930001.

It is not an unprimeable number, because it can be changed into a prime (201930013) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 129842 + ... + 131387.

It is an arithmetic number, because the mean of its divisors is an integer number (50548005).

Almost surely, 2^201930017 is an apocalyptic number.

It is an amenable number.

201930017 is a deficient number, since it is larger than the sum of its proper divisors (262003).

201930017 is an equidigital number, since it uses as much as digits as its factorization.

201930017 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 262002.

The product of its (nonzero) digits is 378, while the sum is 23.

The square root of 201930017 is about 14210.2081969266. The cubic root of 201930017 is about 586.6786634872.

Adding to 201930017 its reverse (710039102), we get a palindrome (911969119).

The spelling of 201930017 in words is "two hundred one million, nine hundred thirty thousand, seventeen".