1279461317 has 4 divisors (see below), whose sum is σ = 1279545036. Its totient is φ = 1279377600.

The previous prime is 1279461301. The next prime is 1279461343. The reversal of 1279461317 is 7131649721.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 738154561 + 541306756 = 27169^2 + 23266^2 .

It is a cyclic number.

It is not a de Polignac number, because 1279461317 - 2⁴ = 1279461301 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1279461347) 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 in 3 ways as a sum of consecutive naturals, for example, 11684 + ... + 51917.

It is an arithmetic number, because the mean of its divisors is an integer number (319886259).

Almost surely, 2^1279461317 is an apocalyptic number.

It is an amenable number.

1279461317 is a deficient number, since it is larger than the sum of its proper divisors (83719).

1279461317 is an equidigital number, since it uses as much as digits as its factorization.

1279461317 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 83718.

The product of its digits is 63504, while the sum is 41.

The square root of 1279461317 is about 35769.5585239740. The cubic root of 1279461317 is about 1085.6147116593.

The spelling of 1279461317 in words is "one billion, two hundred seventy-nine million, four hundred sixty-one thousand, three hundred seventeen".