1148381449 has 2 divisors, whose sum is σ = 1148381450. Its totient is φ = 1148381448.

The previous prime is 1148381447. The next prime is 1148381461. The reversal of 1148381449 is 9441838411.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 694691449 + 453690000 = 26357^2 + 21300^2 .

It is a cyclic number.

It is not a de Polignac number, because 1148381449 - 2¹ = 1148381447 is a prime.

Together with 1148381447, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (1148381441) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 574190724 + 574190725.

It is an arithmetic number, because the mean of its divisors is an integer number (574190725).

Almost surely, 2^1148381449 is an apocalyptic number.

It is an amenable number.

1148381449 is a deficient number, since it is larger than the sum of its proper divisors (1).

1148381449 is an equidigital number, since it uses as much as digits as its factorization.

1148381449 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 110592, while the sum is 43.

The square root of 1148381449 is about 33887.7772803116. Note that the first 3 decimals coincide. The cubic root of 1148381449 is about 1047.1978038544.

The spelling of 1148381449 in words is "one billion, one hundred forty-eight million, three hundred eighty-one thousand, four hundred forty-nine".