203320493 has 8 divisors (see below), whose sum is σ = 216062712. Its totient is φ = 190665216.

The previous prime is 203320477. The next prime is 203320519. The reversal of 203320493 is 394023302.

It can be written as a sum of positive squares in 4 ways, for example, as 33200644 + 170119849 = 5762^2 + 13043^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 203320493 - 2⁴ = 203320477 is a prime.

It is a super-3 number, since 3×203320493³ (a number of 26 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (203320433) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 16880 + ... + 26297.

It is an arithmetic number, because the mean of its divisors is an integer number (27007839).

Almost surely, 2^203320493 is an apocalyptic number.

It is an amenable number.

203320493 is a deficient number, since it is larger than the sum of its proper divisors (12742219).

203320493 is a wasteful number, since it uses less digits than its factorization.

203320493 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43471.

The product of its (nonzero) digits is 3888, while the sum is 26.

The square root of 203320493 is about 14259.0495125026. The cubic root of 203320493 is about 588.0221938111.

Adding to 203320493 its reverse (394023302), we get a palindrome (597343795).

The spelling of 203320493 in words is "two hundred three million, three hundred twenty thousand, four hundred ninety-three".