203423413 has 4 divisors (see below), whose sum is σ = 203589100. Its totient is φ = 203257728.

The previous prime is 203423357. The next prime is 203423483. The reversal of 203423413 is 314324302.

It is a happy number.

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 155301444 + 48121969 = 12462^2 + 6937^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-203423413 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 (203423483) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 80988 + ... + 83461.

It is an arithmetic number, because the mean of its divisors is an integer number (50897275).

Almost surely, 2^203423413 is an apocalyptic number.

It is an amenable number.

203423413 is a deficient number, since it is larger than the sum of its proper divisors (165687).

203423413 is a wasteful number, since it uses less digits than its factorization.

203423413 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 165686.

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

The square root of 203423413 is about 14262.6579921135. The cubic root of 203423413 is about 588.1213952158.

Adding to 203423413 its reverse (314324302), we get a palindrome (517747715).

The spelling of 203423413 in words is "two hundred three million, four hundred twenty-three thousand, four hundred thirteen".