203423013 has 12 divisors (see below), whose sum is σ = 293974668. Its totient is φ = 135550080.

The previous prime is 203423009. The next prime is 203423027. The reversal of 203423013 is 310324302.

203423013 is a `hidden beast` number, since 20 + 342 + 301 + 3 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 110628324 + 92794689 = 10518^2 + 9633^2 .

It is not a de Polignac number, because 203423013 - 2² = 203423009 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (203423083) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 21133 + ... + 29213.

It is an arithmetic number, because the mean of its divisors is an integer number (24497889).

Almost surely, 2^203423013 is an apocalyptic number.

It is an amenable number.

203423013 is a deficient number, since it is larger than the sum of its proper divisors (90551655).

203423013 is a wasteful number, since it uses less digits than its factorization.

203423013 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10884 (or 10881 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 18.

The square root of 203423013 is about 14262.6439694749. The cubic root of 203423013 is about 588.1210097330.

Adding to 203423013 its reverse (310324302), we get a palindrome (513747315).

The spelling of 203423013 in words is "two hundred three million, four hundred twenty-three thousand, thirteen".