1296778683 has 16 divisors (see below), whose sum is σ = 1851323040. Its totient is φ = 804519936.

The previous prime is 1296778669. The next prime is 1296778711. The reversal of 1296778683 is 3868776921.

It is not a de Polignac number, because 1296778683 - 2⁴ = 1296778667 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1296778283) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 138310 + ... + 147387.

It is an arithmetic number, because the mean of its divisors is an integer number (115707690).

Almost surely, 2^1296778683 is an apocalyptic number.

1296778683 is a deficient number, since it is larger than the sum of its proper divisors (554544357).

1296778683 is a wasteful number, since it uses less digits than its factorization.

1296778683 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 285806.

The product of its digits is 6096384, while the sum is 57.

The square root of 1296778683 is about 36010.8134176389. The cubic root of 1296778683 is about 1090.4906701473.

The spelling of 1296778683 in words is "one billion, two hundred ninety-six million, seven hundred seventy-eight thousand, six hundred eighty-three".