1278883079 has 4 divisors (see below), whose sum is σ = 1279679520. Its totient is φ = 1278086640.

The previous prime is 1278883063. The next prime is 1278883091. The reversal of 1278883079 is 9703888721.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 9703888721 = 863 ⋅11244367.

It is a cyclic number.

It is not a de Polignac number, because 1278883079 - 2⁴ = 1278883063 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1278883079.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1278883049) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 395807 + ... + 399024.

It is an arithmetic number, because the mean of its divisors is an integer number (319919880).

Almost surely, 2^1278883079 is an apocalyptic number.

1278883079 is a deficient number, since it is larger than the sum of its proper divisors (796441).

1278883079 is an equidigital number, since it uses as much as digits as its factorization.

1278883079 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 796440.

The product of its (nonzero) digits is 1354752, while the sum is 53.

The square root of 1278883079 is about 35761.4747878216. The cubic root of 1278883079 is about 1085.4511432726.

The spelling of 1278883079 in words is "one billion, two hundred seventy-eight million, eight hundred eighty-three thousand, seventy-nine".