1301319979 has 4 divisors (see below), whose sum is σ = 1302106984. Its totient is φ = 1300532976.

The previous prime is 1301319947. The next prime is 1301320003. The reversal of 1301319979 is 9799131031.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1301319979 - 2⁵ = 1301319947 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1301319779) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 391017 + ... + 394330.

It is an arithmetic number, because the mean of its divisors is an integer number (325526746).

Almost surely, 2^1301319979 is an apocalyptic number.

1301319979 is a deficient number, since it is larger than the sum of its proper divisors (787005).

1301319979 is an equidigital number, since it uses as much as digits as its factorization.

1301319979 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 787004.

The product of its (nonzero) digits is 45927, while the sum is 43.

The square root of 1301319979 is about 36073.8129257222. The cubic root of 1301319979 is about 1091.7621467473.

The spelling of 1301319979 in words is "one billion, three hundred one million, three hundred nineteen thousand, nine hundred seventy-nine".