203430901 has 4 divisors (see below), whose sum is σ = 203721804. Its totient is φ = 203140000.

The previous prime is 203430869. The next prime is 203430923. The reversal of 203430901 is 109034302.

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 168974001 + 34456900 = 12999^2 + 5870^2 .

It is a cyclic number.

It is not a de Polignac number, because 203430901 - 2⁵ = 203430869 is a prime.

It is a Smith number, since the sum of its digits (22) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (203430991) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 144400 + ... + 145801.

It is an arithmetic number, because the mean of its divisors is an integer number (50930451).

Almost surely, 2^203430901 is an apocalyptic number.

It is an amenable number.

203430901 is a deficient number, since it is larger than the sum of its proper divisors (290903).

203430901 is an equidigital number, since it uses as much as digits as its factorization.

203430901 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 290902.

The product of its (nonzero) digits is 648, while the sum is 22.

The square root of 203430901 is about 14262.9204933632. The cubic root of 203430901 is about 588.1286113615.

The spelling of 203430901 in words is "two hundred three million, four hundred thirty thousand, nine hundred one".