1313732779 has 2 divisors, whose sum is σ = 1313732780. Its totient is φ = 1313732778.

The previous prime is 1313732759. The next prime is 1313732803. The reversal of 1313732779 is 9772373131.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1313732779 - 2²⁹ = 776861867 is a prime.

It is not a weakly prime, because it can be changed into another prime (1313732759) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 656866389 + 656866390.

It is an arithmetic number, because the mean of its divisors is an integer number (656866390).

Almost surely, 2^1313732779 is an apocalyptic number.

1313732779 is a deficient number, since it is larger than the sum of its proper divisors (1).

1313732779 is an equidigital number, since it uses as much as digits as its factorization.

1313732779 is an evil number, because the sum of its binary digits is even.

The product of its digits is 166698, while the sum is 43.

The square root of 1313732779 is about 36245.4518388170. The cubic root of 1313732779 is about 1095.2224700360. Note that the first 3 decimals are identical.

The spelling of 1313732779 in words is "one billion, three hundred thirteen million, seven hundred thirty-two thousand, seven hundred seventy-nine".