1286767969 has 2 divisors, whose sum is σ = 1286767970. Its totient is φ = 1286767968.

The previous prime is 1286767943. The next prime is 1286767987. The reversal of 1286767969 is 9697676821.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1089000000 + 197767969 = 33000^2 + 14063^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1286767969 is a prime.

It is a super-2 number, since 2×1286767969² = 3311543612088769922, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1286467969) 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, 643383984 + 643383985.

It is an arithmetic number, because the mean of its divisors is an integer number (643383985).

Almost surely, 2^1286767969 is an apocalyptic number.

It is an amenable number.

1286767969 is a deficient number, since it is larger than the sum of its proper divisors (1).

1286767969 is an equidigital number, since it uses as much as digits as its factorization.

1286767969 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 13716864, while the sum is 61.

The square root of 1286767969 is about 35871.5481823687. The cubic root of 1286767969 is about 1087.6773393625.

The spelling of 1286767969 in words is "one billion, two hundred eighty-six million, seven hundred sixty-seven thousand, nine hundred sixty-nine".