1253973449 has 2 divisors, whose sum is σ = 1253973450. Its totient is φ = 1253973448.

The previous prime is 1253973443. The next prime is 1253973463. The reversal of 1253973449 is 9443793521.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1251744400 + 2229049 = 35380^2 + 1493^2 .

It is a cyclic number.

It is not a de Polignac number, because 1253973449 - 2²⁰ = 1252924873 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (1253973443) 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, 626986724 + 626986725.

It is an arithmetic number, because the mean of its divisors is an integer number (626986725).

Almost surely, 2^1253973449 is an apocalyptic number.

It is an amenable number.

1253973449 is a deficient number, since it is larger than the sum of its proper divisors (1).

1253973449 is an equidigital number, since it uses as much as digits as its factorization.

1253973449 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 816480, while the sum is 47.

The square root of 1253973449 is about 35411.4875287667. The cubic root of 1253973449 is about 1078.3575425788.

The spelling of 1253973449 in words is "one billion, two hundred fifty-three million, nine hundred seventy-three thousand, four hundred forty-nine".