1203113209 has 2 divisors, whose sum is σ = 1203113210. Its totient is φ = 1203113208.

The previous prime is 1203113207. The next prime is 1203113221. The reversal of 1203113209 is 9023113021.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1189215225 + 13897984 = 34485^2 + 3728^2 .

It is a cyclic number.

It is not a de Polignac number, because 1203113209 - 2¹ = 1203113207 is a prime.

Together with 1203113207, it forms a pair of twin primes.

It is a self number, because there is not a number n which added to its sum of digits gives 1203113209.

It is not a weakly prime, because it can be changed into another prime (1203113207) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 601556604 + 601556605.

It is an arithmetic number, because the mean of its divisors is an integer number (601556605).

Almost surely, 2^1203113209 is an apocalyptic number.

It is an amenable number.

1203113209 is a deficient number, since it is larger than the sum of its proper divisors (1).

1203113209 is an equidigital number, since it uses as much as digits as its factorization.

1203113209 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 324, while the sum is 22.

The square root of 1203113209 is about 34685.9223461046. The cubic root of 1203113209 is about 1063.5767417949.

The spelling of 1203113209 in words is "one billion, two hundred three million, one hundred thirteen thousand, two hundred nine".