1371243449 has 2 divisors, whose sum is σ = 1371243450. Its totient is φ = 1371243448.

The previous prime is 1371243431. The next prime is 1371243481. The reversal of 1371243449 is 9443421731.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1315367824 + 55875625 = 36268^2 + 7475^2 .

It is a cyclic number.

It is not a de Polignac number, because 1371243449 - 2⁸ = 1371243193 is a prime.

It is not a weakly prime, because it can be changed into another prime (1371243649) 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, 685621724 + 685621725.

It is an arithmetic number, because the mean of its divisors is an integer number (685621725).

Almost surely, 2^1371243449 is an apocalyptic number.

It is an amenable number.

1371243449 is a deficient number, since it is larger than the sum of its proper divisors (1).

1371243449 is an equidigital number, since it uses as much as digits as its factorization.

1371243449 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 72576, while the sum is 38.

The square root of 1371243449 is about 37030.3044680975. The cubic root of 1371243449 is about 1110.9764556525.

The spelling of 1371243449 in words is "one billion, three hundred seventy-one million, two hundred forty-three thousand, four hundred forty-nine".