1309047449 has 2 divisors, whose sum is σ = 1309047450. Its totient is φ = 1309047448.

The previous prime is 1309047391. The next prime is 1309047463. The reversal of 1309047449 is 9447409031.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 812649049 + 496398400 = 28507^2 + 22280^2 .

It is a cyclic number.

It is not a de Polignac number, because 1309047449 - 2²⁰ = 1307998873 is a prime.

It is not a weakly prime, because it can be changed into another prime (1309047469) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 654523724 + 654523725.

It is an arithmetic number, because the mean of its divisors is an integer number (654523725).

Almost surely, 2^1309047449 is an apocalyptic number.

It is an amenable number.

1309047449 is a deficient number, since it is larger than the sum of its proper divisors (1).

1309047449 is an equidigital number, since it uses as much as digits as its factorization.

1309047449 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 108864, while the sum is 41.

The square root of 1309047449 is about 36180.7607576181. The cubic root of 1309047449 is about 1093.9189093630.

The spelling of 1309047449 in words is "one billion, three hundred nine million, forty-seven thousand, four hundred forty-nine".