203423321 has 4 divisors (see below), whose sum is σ = 205289700. Its totient is φ = 201556944.

The previous prime is 203423317. The next prime is 203423347. The reversal of 203423321 is 123324302.

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 99281296 + 104142025 = 9964^2 + 10205^2 .

It is a cyclic number.

It is not a de Polignac number, because 203423321 - 2² = 203423317 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 203423293 and 203423302.

It is not an unprimeable number, because it can be changed into a prime (203423221) 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, 933026 + ... + 933243.

It is an arithmetic number, because the mean of its divisors is an integer number (51322425).

Almost surely, 2^203423321 is an apocalyptic number.

It is an amenable number.

203423321 is a deficient number, since it is larger than the sum of its proper divisors (1866379).

203423321 is a wasteful number, since it uses less digits than its factorization.

203423321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1866378.

The product of its (nonzero) digits is 864, while the sum is 20.

The square root of 203423321 is about 14262.6547669079. The cubic root of 203423321 is about 588.1213065548.

Adding to 203423321 its reverse (123324302), we get a palindrome (326747623).

The spelling of 203423321 in words is "two hundred three million, four hundred twenty-three thousand, three hundred twenty-one".