201323663 has 4 divisors (see below), whose sum is σ = 201855240. Its totient is φ = 200792088.

The previous prime is 201323657. The next prime is 201323671. The reversal of 201323663 is 366323102.

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 201323663 - 2¹⁴ = 201307279 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 (201323693) 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, 265220 + ... + 265977.

It is an arithmetic number, because the mean of its divisors is an integer number (50463810).

Almost surely, 2^201323663 is an apocalyptic number.

201323663 is a deficient number, since it is larger than the sum of its proper divisors (531577).

201323663 is an equidigital number, since it uses as much as digits as its factorization.

201323663 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 531576.

The product of its (nonzero) digits is 3888, while the sum is 26.

The square root of 201323663 is about 14188.8570011823. The cubic root of 201323663 is about 586.0908499121.

Adding to 201323663 its reverse (366323102), we get a palindrome (567646765).

The spelling of 201323663 in words is "two hundred one million, three hundred twenty-three thousand, six hundred sixty-three".