1279167947 has 4 divisors (see below), whose sum is σ = 1279239480. Its totient is φ = 1279096416.

The previous prime is 1279167889. The next prime is 1279168001. The reversal of 1279167947 is 7497619721.

It is a happy number.

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 is a cyclic number.

It is not a de Polignac number, because 1279167947 - 2⁸ = 1279167691 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1279167047) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 17588 + ... + 53550.

It is an arithmetic number, because the mean of its divisors is an integer number (319809870).

Almost surely, 2^1279167947 is an apocalyptic number.

1279167947 is a deficient number, since it is larger than the sum of its proper divisors (71533).

1279167947 is an equidigital number, since it uses as much as digits as its factorization.

1279167947 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 71532.

The product of its digits is 1333584, while the sum is 53.

The square root of 1279167947 is about 35765.4574554835. The cubic root of 1279167947 is about 1085.5317311297.

The spelling of 1279167947 in words is "one billion, two hundred seventy-nine million, one hundred sixty-seven thousand, nine hundred forty-seven".