203404493 has 2 divisors, whose sum is σ = 203404494. Its totient is φ = 203404492.

The previous prime is 203404483. The next prime is 203404517. The reversal of 203404493 is 394404302.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 149499529 + 53904964 = 12227^2 + 7342^2 .

It is a cyclic number.

It is not a de Polignac number, because 203404493 - 2²⁰ = 202355917 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (203404483) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 101702246 + 101702247.

It is an arithmetic number, because the mean of its divisors is an integer number (101702247).

Almost surely, 2^203404493 is an apocalyptic number.

It is an amenable number.

203404493 is a deficient number, since it is larger than the sum of its proper divisors (1).

203404493 is an equidigital number, since it uses as much as digits as its factorization.

203404493 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 10368, while the sum is 29.

The square root of 203404493 is about 14261.9947062113. The cubic root of 203404493 is about 588.1031613236.

Adding to 203404493 its reverse (394404302), we get a palindrome (597808795).

The spelling of 203404493 in words is "two hundred three million, four hundred four thousand, four hundred ninety-three".