1296739091 has 2 divisors, whose sum is σ = 1296739092. Its totient is φ = 1296739090.

The previous prime is 1296739079. The next prime is 1296739097. The reversal of 1296739091 is 1909376921.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1296739091 - 2¹⁰ = 1296738067 is a prime.

It is not a weakly prime, because it can be changed into another prime (1296739097) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 648369545 + 648369546.

It is an arithmetic number, because the mean of its divisors is an integer number (648369546).

Almost surely, 2^1296739091 is an apocalyptic number.

1296739091 is a deficient number, since it is larger than the sum of its proper divisors (1).

1296739091 is an equidigital number, since it uses as much as digits as its factorization.

1296739091 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 183708, while the sum is 47.

The square root of 1296739091 is about 36010.2636896760. The cubic root of 1296739091 is about 1090.4795720967.

The spelling of 1296739091 in words is "one billion, two hundred ninety-six million, seven hundred thirty-nine thousand, ninety-one".