1296121793 has 2 divisors, whose sum is σ = 1296121794. Its totient is φ = 1296121792.

The previous prime is 1296121777. The next prime is 1296121819. The reversal of 1296121793 is 3971216921.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 732676624 + 563445169 = 27068^2 + 23737^2 .

It is a cyclic number.

It is not a de Polignac number, because 1296121793 - 2⁴ = 1296121777 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1296121793.

It is not a weakly prime, because it can be changed into another prime (1296121703) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 648060896 + 648060897.

It is an arithmetic number, because the mean of its divisors is an integer number (648060897).

Almost surely, 2^1296121793 is an apocalyptic number.

It is an amenable number.

1296121793 is a deficient number, since it is larger than the sum of its proper divisors (1).

1296121793 is an equidigital number, since it uses as much as digits as its factorization.

1296121793 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 40824, while the sum is 41.

The square root of 1296121793 is about 36001.6915297045. The cubic root of 1296121793 is about 1090.3065078036.

The spelling of 1296121793 in words is "one billion, two hundred ninety-six million, one hundred twenty-one thousand, seven hundred ninety-three".