202643023 has 4 divisors (see below), whose sum is σ = 221065128. Its totient is φ = 184220920.

The previous prime is 202643003. The next prime is 202643027. The reversal of 202643023 is 320346202.

It is a happy number.

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 202643023 - 2⁹ = 202642511 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 202642985 and 202643003.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (202643027) 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, 9211036 + ... + 9211057.

It is an arithmetic number, because the mean of its divisors is an integer number (55266282).

Almost surely, 2^202643023 is an apocalyptic number.

202643023 is a deficient number, since it is larger than the sum of its proper divisors (18422105).

202643023 is a wasteful number, since it uses less digits than its factorization.

202643023 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18422104.

The product of its (nonzero) digits is 1728, while the sum is 22.

The square root of 202643023 is about 14235.2738997183. The cubic root of 202643023 is about 587.3683645324.

Adding to 202643023 its reverse (320346202), we get a palindrome (522989225).

The spelling of 202643023 in words is "two hundred two million, six hundred forty-three thousand, twenty-three".