1302889649 has 2 divisors, whose sum is σ = 1302889650. Its totient is φ = 1302889648.

The previous prime is 1302889589. The next prime is 1302889663. The reversal of 1302889649 is 9469882031.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1158721600 + 144168049 = 34040^2 + 12007^2 .

It is a cyclic number.

It is not a de Polignac number, because 1302889649 - 2²⁸ = 1034454193 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1302889597 and 1302889606.

It is not a weakly prime, because it can be changed into another prime (1302889849) 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, 651444824 + 651444825.

It is an arithmetic number, because the mean of its divisors is an integer number (651444825).

Almost surely, 2^1302889649 is an apocalyptic number.

It is an amenable number.

1302889649 is a deficient number, since it is larger than the sum of its proper divisors (1).

1302889649 is an equidigital number, since it uses as much as digits as its factorization.

1302889649 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 746496, while the sum is 50.

The square root of 1302889649 is about 36095.5627328346. The cubic root of 1302889649 is about 1092.2009365263.

The spelling of 1302889649 in words is "one billion, three hundred two million, eight hundred eighty-nine thousand, six hundred forty-nine".