130203209 has 2 divisors, whose sum is σ = 130203210. Its totient is φ = 130203208.

The previous prime is 130203133. The next prime is 130203239. The reversal of 130203209 is 902302031.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 78765625 + 51437584 = 8875^2 + 7172^2 .

It is a cyclic number.

It is not a de Polignac number, because 130203209 - 2¹⁶ = 130137673 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (130203239) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 65101604 + 65101605.

It is an arithmetic number, because the mean of its divisors is an integer number (65101605).

Almost surely, 2^130203209 is an apocalyptic number.

It is an amenable number.

130203209 is a deficient number, since it is larger than the sum of its proper divisors (1).

130203209 is an equidigital number, since it uses as much as digits as its factorization.

130203209 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 20.

The square root of 130203209 is about 11410.6620754451. The cubic root of 130203209 is about 506.8435172014.

The spelling of 130203209 in words is "one hundred thirty million, two hundred three thousand, two hundred nine".