1286788049 has 2 divisors, whose sum is σ = 1286788050. Its totient is φ = 1286788048.

The previous prime is 1286788039. The next prime is 1286788057. The reversal of 1286788049 is 9408876821.

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., 1271421649 + 15366400 = 35657^2 + 3920^2 .

It is a cyclic number.

It is not a de Polignac number, because 1286788049 - 2⁸ = 1286787793 is a prime.

It is not a weakly prime, because it can be changed into another prime (1286788039) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 643394024 + 643394025.

It is an arithmetic number, because the mean of its divisors is an integer number (643394025).

Almost surely, 2^1286788049 is an apocalyptic number.

It is an amenable number.

1286788049 is a deficient number, since it is larger than the sum of its proper divisors (1).

1286788049 is an equidigital number, since it uses as much as digits as its factorization.

1286788049 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1548288, while the sum is 53.

The square root of 1286788049 is about 35871.8280688342. The cubic root of 1286788049 is about 1087.6829970640.

The spelling of 1286788049 in words is "one billion, two hundred eighty-six million, seven hundred eighty-eight thousand, forty-nine".