1543241449 has 2 divisors, whose sum is σ = 1543241450. Its totient is φ = 1543241448.

The previous prime is 1543241443. The next prime is 1543241507. The reversal of 1543241449 is 9441423451.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1541975824 + 1265625 = 39268^2 + 1125^2 .

It is a cyclic number.

It is not a de Polignac number, because 1543241449 - 2¹⁹ = 1542717161 is a prime.

It is not a weakly prime, because it can be changed into another prime (1543241443) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 771620724 + 771620725.

It is an arithmetic number, because the mean of its divisors is an integer number (771620725).

Almost surely, 2^1543241449 is an apocalyptic number.

It is an amenable number.

1543241449 is a deficient number, since it is larger than the sum of its proper divisors (1).

1543241449 is an equidigital number, since it uses as much as digits as its factorization.

1543241449 is an evil number, because the sum of its binary digits is even.

The product of its digits is 69120, while the sum is 37.

The square root of 1543241449 is about 39284.1119156333. Note that the first 3 decimals coincide. The cubic root of 1543241449 is about 1155.6100046668.

The spelling of 1543241449 in words is "one billion, five hundred forty-three million, two hundred forty-one thousand, four hundred forty-nine".