1279136827 has 2 divisors, whose sum is σ = 1279136828. Its totient is φ = 1279136826.

The previous prime is 1279136783. The next prime is 1279136857. The reversal of 1279136827 is 7286319721.

It is a strong prime.

It is an emirp because it is prime and its reverse (7286319721) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1279136827 - 2⁷ = 1279136699 is a prime.

It is not a weakly prime, because it can be changed into another prime (1279136857) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 639568413 + 639568414.

It is an arithmetic number, because the mean of its divisors is an integer number (639568414).

Almost surely, 2^1279136827 is an apocalyptic number.

1279136827 is a deficient number, since it is larger than the sum of its proper divisors (1).

1279136827 is an equidigital number, since it uses as much as digits as its factorization.

1279136827 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 254016, while the sum is 46.

The square root of 1279136827 is about 35765.0223961904. The cubic root of 1279136827 is about 1085.5229280059.

The spelling of 1279136827 in words is "one billion, two hundred seventy-nine million, one hundred thirty-six thousand, eight hundred twenty-seven".