1286788897 has 2 divisors, whose sum is σ = 1286788898. Its totient is φ = 1286788896.

The previous prime is 1286788891. The next prime is 1286788933. The reversal of 1286788897 is 7988876821.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 709636321 + 577152576 = 26639^2 + 24024^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1286788897 is a prime.

It is not a weakly prime, because it can be changed into another prime (1286788891) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 643394448 + 643394449.

It is an arithmetic number, because the mean of its divisors is an integer number (643394449).

Almost surely, 2^1286788897 is an apocalyptic number.

It is an amenable number.

1286788897 is a deficient number, since it is larger than the sum of its proper divisors (1).

1286788897 is an equidigital number, since it uses as much as digits as its factorization.

1286788897 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 21676032, while the sum is 64.

The square root of 1286788897 is about 35871.8398886926. The cubic root of 1286788897 is about 1087.6832359936.

The spelling of 1286788897 in words is "one billion, two hundred eighty-six million, seven hundred eighty-eight thousand, eight hundred ninety-seven".