1279934113 has 2 divisors, whose sum is σ = 1279934114. Its totient is φ = 1279934112.

The previous prime is 1279934083. The next prime is 1279934171. The reversal of 1279934113 is 3114399721.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 717864849 + 562069264 = 26793^2 + 23708^2 .

It is a cyclic number.

It is not a de Polignac number, because 1279934113 - 2²¹ = 1277836961 is a prime.

It is not a weakly prime, because it can be changed into another prime (1279934713) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 639967056 + 639967057.

It is an arithmetic number, because the mean of its divisors is an integer number (639967057).

Almost surely, 2^1279934113 is an apocalyptic number.

It is an amenable number.

1279934113 is a deficient number, since it is larger than the sum of its proper divisors (1).

1279934113 is an equidigital number, since it uses as much as digits as its factorization.

1279934113 is an evil number, because the sum of its binary digits is even.

The product of its digits is 40824, while the sum is 40.

The square root of 1279934113 is about 35776.1668293293. The cubic root of 1279934113 is about 1085.7484166481.

The spelling of 1279934113 in words is "one billion, two hundred seventy-nine million, nine hundred thirty-four thousand, one hundred thirteen".