1304203009 has 2 divisors, whose sum is σ = 1304203010. Its totient is φ = 1304203008.

The previous prime is 1304203003. The next prime is 1304203013. The reversal of 1304203009 is 9003024031.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 748186609 + 556016400 = 27353^2 + 23580^2 .

It is a cyclic number.

It is not a de Polignac number, because 1304203009 - 2¹⁹ = 1303678721 is a prime.

It is not a weakly prime, because it can be changed into another prime (1304203003) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 652101504 + 652101505.

It is an arithmetic number, because the mean of its divisors is an integer number (652101505).

Almost surely, 2^1304203009 is an apocalyptic number.

It is an amenable number.

1304203009 is a deficient number, since it is larger than the sum of its proper divisors (1).

1304203009 is an equidigital number, since it uses as much as digits as its factorization.

1304203009 is an odious number, because the sum of its binary digits is odd.

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

The square root of 1304203009 is about 36113.7509682946. The cubic root of 1304203009 is about 1092.5678059946.

The spelling of 1304203009 in words is "one billion, three hundred four million, two hundred three thousand, nine".