1296573979 has 2 divisors, whose sum is σ = 1296573980. Its totient is φ = 1296573978.

The previous prime is 1296573947. The next prime is 1296574049. The reversal of 1296573979 is 9793756921.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1296573979 - 2⁵ = 1296573947 is a prime.

It is a super-2 number, since 2×1296573979² = 3362208166039784882, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1296571979) 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 as a sum of consecutive naturals, namely, 648286989 + 648286990.

It is an arithmetic number, because the mean of its divisors is an integer number (648286990).

Almost surely, 2^1296573979 is an apocalyptic number.

1296573979 is a deficient number, since it is larger than the sum of its proper divisors (1).

1296573979 is an equidigital number, since it uses as much as digits as its factorization.

1296573979 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 6429780, while the sum is 58.

The square root of 1296573979 is about 36007.9710480888. The cubic root of 1296573979 is about 1090.4332870456.

The spelling of 1296573979 in words is "one billion, two hundred ninety-six million, five hundred seventy-three thousand, nine hundred seventy-nine".