201423717 has 48 divisors (see below), whose sum is σ = 329142528. Its totient is φ = 117642240.

The previous prime is 201423697. The next prime is 201423721. The reversal of 201423717 is 717324102.

It is a happy number.

It is not a de Polignac number, because 201423717 - 2¹⁰ = 201422693 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (201423737) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 339373 + ... + 339965.

It is an arithmetic number, because the mean of its divisors is an integer number (6857136).

Almost surely, 2^201423717 is an apocalyptic number.

It is an amenable number.

201423717 is a deficient number, since it is larger than the sum of its proper divisors (127718811).

201423717 is a wasteful number, since it uses less digits than its factorization.

201423717 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 730 (or 727 counting only the distinct ones).

The product of its (nonzero) digits is 2352, while the sum is 27.

The square root of 201423717 is about 14192.3823581526. The cubic root of 201423717 is about 586.1879258035.

Adding to 201423717 its reverse (717324102), we get a palindrome (918747819).

The spelling of 201423717 in words is "two hundred one million, four hundred twenty-three thousand, seven hundred seventeen".