1300243409 has 2 divisors, whose sum is σ = 1300243410. Its totient is φ = 1300243408.

The previous prime is 1300243379. The next prime is 1300243421. The reversal of 1300243409 is 9043420031.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1197160000 + 103083409 = 34600^2 + 10153^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1300243409 is a prime.

It is not a weakly prime, because it can be changed into another prime (1300243459) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 650121704 + 650121705.

It is an arithmetic number, because the mean of its divisors is an integer number (650121705).

Almost surely, 2^1300243409 is an apocalyptic number.

It is an amenable number.

1300243409 is a deficient number, since it is larger than the sum of its proper divisors (1).

1300243409 is an equidigital number, since it uses as much as digits as its factorization.

1300243409 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2592, while the sum is 26.

The square root of 1300243409 is about 36058.8880721522. Note that the first 3 decimals coincide. The cubic root of 1300243409 is about 1091.4609954385.

The spelling of 1300243409 in words is "one billion, three hundred million, two hundred forty-three thousand, four hundred nine".