1279887067 has 2 divisors, whose sum is σ = 1279887068. Its totient is φ = 1279887066.

The previous prime is 1279887031. The next prime is 1279887071. The reversal of 1279887067 is 7607889721.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1279887067 is a prime.

It is a super-2 number, since 2×1279887067² = 3276221808547724978, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1279886999 and 1279887017.

It is not a weakly prime, because it can be changed into another prime (1279881067) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 639943533 + 639943534.

It is an arithmetic number, because the mean of its divisors is an integer number (639943534).

Almost surely, 2^1279887067 is an apocalyptic number.

1279887067 is a deficient number, since it is larger than the sum of its proper divisors (1).

1279887067 is an equidigital number, since it uses as much as digits as its factorization.

1279887067 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2370816, while the sum is 55.

The square root of 1279887067 is about 35775.5093185268. The cubic root of 1279887067 is about 1085.7351136858.

The spelling of 1279887067 in words is "one billion, two hundred seventy-nine million, eight hundred eighty-seven thousand, sixty-seven".