203420353 has 4 divisors (see below), whose sum is σ = 204035248. Its totient is φ = 202805460.

The previous prime is 203420341. The next prime is 203420359. The reversal of 203420353 is 353024302.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 203420353 - 2²¹ = 201323201 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (203420359) 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, 306951 + ... + 307612.

It is an arithmetic number, because the mean of its divisors is an integer number (51008812).

Almost surely, 2^203420353 is an apocalyptic number.

It is an amenable number.

203420353 is a deficient number, since it is larger than the sum of its proper divisors (614895).

203420353 is an equidigital number, since it uses as much as digits as its factorization.

203420353 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 614894.

The product of its (nonzero) digits is 2160, while the sum is 22.

The square root of 203420353 is about 14262.5507185777. The cubic root of 203420353 is about 588.1184462592.

Adding to 203420353 its reverse (353024302), we get a palindrome (556444655).

The spelling of 203420353 in words is "two hundred three million, four hundred twenty thousand, three hundred fifty-three".