1263965489 has 2 divisors, whose sum is σ = 1263965490. Its totient is φ = 1263965488.

The previous prime is 1263965467. The next prime is 1263965497. The reversal of 1263965489 is 9845693621.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1075315264 + 188650225 = 32792^2 + 13735^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1263965489 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1263965489.

It is not a weakly prime, because it can be changed into another prime (1263965089) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 631982744 + 631982745.

It is an arithmetic number, because the mean of its divisors is an integer number (631982745).

Almost surely, 2^1263965489 is an apocalyptic number.

It is an amenable number.

1263965489 is a deficient number, since it is larger than the sum of its proper divisors (1).

1263965489 is an equidigital number, since it uses as much as digits as its factorization.

1263965489 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2799360, while the sum is 53.

The square root of 1263965489 is about 35552.2923170926. The cubic root of 1263965489 is about 1081.2141948383.

The spelling of 1263965489 in words is "one billion, two hundred sixty-three million, nine hundred sixty-five thousand, four hundred eighty-nine".