1278930979 has 8 divisors (see below), whose sum is σ = 1294760160. Its totient is φ = 1263134400.

The previous prime is 1278930967. The next prime is 1278930997. The reversal of 1278930979 is 9790398721.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1278930979 - 2²¹ = 1276833827 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1278933979) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 76114 + ... + 91384.

It is an arithmetic number, because the mean of its divisors is an integer number (161845020).

Almost surely, 2^1278930979 is an apocalyptic number.

1278930979 is a deficient number, since it is larger than the sum of its proper divisors (15829181).

1278930979 is an equidigital number, since it uses as much as digits as its factorization.

1278930979 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16301.

The product of its (nonzero) digits is 1714608, while the sum is 55.

The square root of 1278930979 is about 35762.1444966602. The cubic root of 1278930979 is about 1085.4646948009.

The spelling of 1278930979 in words is "one billion, two hundred seventy-eight million, nine hundred thirty thousand, nine hundred seventy-nine".