1313780689 has 32 divisors (see below), whose sum is σ = 1540183680. Its totient is φ = 1109763072.

The previous prime is 1313780653. The next prime is 1313780701. The reversal of 1313780689 is 9860873131.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1313780689 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1313780609) 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 31 ways as a sum of consecutive naturals, for example, 1228447 + ... + 1229515.

It is an arithmetic number, because the mean of its divisors is an integer number (48130740).

Almost surely, 2^1313780689 is an apocalyptic number.

It is an amenable number.

1313780689 is a deficient number, since it is larger than the sum of its proper divisors (226402991).

1313780689 is a wasteful number, since it uses less digits than its factorization.

1313780689 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1249.

The product of its (nonzero) digits is 217728, while the sum is 46.

The square root of 1313780689 is about 36246.1127432998. The cubic root of 1313780689 is about 1095.2357836189.

The spelling of 1313780689 in words is "one billion, three hundred thirteen million, seven hundred eighty thousand, six hundred eighty-nine".