1045643449 has 2 divisors, whose sum is σ = 1045643450. Its totient is φ = 1045643448.

The previous prime is 1045643387. The next prime is 1045643453. The reversal of 1045643449 is 9443465401.

1045643449 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 968765625 + 76877824 = 31125^2 + 8768^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1045643449 is a prime.

It is not a weakly prime, because it can be changed into another prime (1045643479) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 522821724 + 522821725.

It is an arithmetic number, because the mean of its divisors is an integer number (522821725).

Almost surely, 2^1045643449 is an apocalyptic number.

It is an amenable number.

1045643449 is a deficient number, since it is larger than the sum of its proper divisors (1).

1045643449 is an equidigital number, since it uses as much as digits as its factorization.

1045643449 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 207360, while the sum is 40.

The square root of 1045643449 is about 32336.4105769332. The cubic root of 1045643449 is about 1014.9886994301.

The spelling of 1045643449 in words is "one billion, forty-five million, six hundred forty-three thousand, four hundred forty-nine".