1326563449 has 2 divisors, whose sum is σ = 1326563450. Its totient is φ = 1326563448.

The previous prime is 1326563429. The next prime is 1326563453. The reversal of 1326563449 is 9443656231.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 976125049 + 350438400 = 31243^2 + 18720^2 .

It is a cyclic number.

It is not a de Polignac number, because 1326563449 - 2¹⁷ = 1326432377 is a prime.

It is not a weakly prime, because it can be changed into another prime (1326563419) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 663281724 + 663281725.

It is an arithmetic number, because the mean of its divisors is an integer number (663281725).

Almost surely, 2^1326563449 is an apocalyptic number.

It is an amenable number.

1326563449 is a deficient number, since it is larger than the sum of its proper divisors (1).

1326563449 is an equidigital number, since it uses as much as digits as its factorization.

1326563449 is an evil number, because the sum of its binary digits is even.

The product of its digits is 466560, while the sum is 43.

The square root of 1326563449 is about 36422.0187386696. The cubic root of 1326563449 is about 1098.7764491677.

The spelling of 1326563449 in words is "one billion, three hundred twenty-six million, five hundred sixty-three thousand, four hundred forty-nine".