203343109 has 2 divisors, whose sum is σ = 203343110. Its totient is φ = 203343108.

The previous prime is 203343053. The next prime is 203343113. The reversal of 203343109 is 901343302.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 182385025 + 20958084 = 13505^2 + 4578^2 .

It is a cyclic number.

It is not a de Polignac number, because 203343109 - 2⁹ = 203342597 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (203344109) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 101671554 + 101671555.

It is an arithmetic number, because the mean of its divisors is an integer number (101671555).

Almost surely, 2^203343109 is an apocalyptic number.

It is an amenable number.

203343109 is a deficient number, since it is larger than the sum of its proper divisors (1).

203343109 is an equidigital number, since it uses as much as digits as its factorization.

203343109 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1944, while the sum is 25.

The square root of 203343109 is about 14259.8425306874. The cubic root of 203343109 is about 588.0439955434.

The spelling of 203343109 in words is "two hundred three million, three hundred forty-three thousand, one hundred nine".