201017423 has 4 divisors (see below), whose sum is σ = 207501888. Its totient is φ = 194532960.

The previous prime is 201017419. The next prime is 201017429. The reversal of 201017423 is 324710102.

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

It is a cyclic number.

It is not a de Polignac number, because 201017423 - 2² = 201017419 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 201017395 and 201017404.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (201017429) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3242186 + ... + 3242247.

It is an arithmetic number, because the mean of its divisors is an integer number (51875472).

Almost surely, 2^201017423 is an apocalyptic number.

201017423 is a deficient number, since it is larger than the sum of its proper divisors (6484465).

201017423 is an equidigital number, since it uses as much as digits as its factorization.

201017423 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6484464.

The product of its (nonzero) digits is 336, while the sum is 20.

The square root of 201017423 is about 14178.0613272760. The cubic root of 201017423 is about 585.7935251255.

Adding to 201017423 its reverse (324710102), we get a palindrome (525727525).

The spelling of 201017423 in words is "two hundred one million, seventeen thousand, four hundred twenty-three".