1296347917 has 4 divisors (see below), whose sum is σ = 1301727196. Its totient is φ = 1290968640.

The previous prime is 1296347909. The next prime is 1296347939. The reversal of 1296347917 is 7197436921.

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

It can be written as a sum of positive squares in 2 ways, for example, as 1106294121 + 190053796 = 33261^2 + 13786^2 .

It is a cyclic number.

It is not a de Polignac number, because 1296347917 - 2³ = 1296347909 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1296347977) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2689278 + ... + 2689759.

It is an arithmetic number, because the mean of its divisors is an integer number (325431799).

Almost surely, 2^1296347917 is an apocalyptic number.

It is an amenable number.

1296347917 is a deficient number, since it is larger than the sum of its proper divisors (5379279).

1296347917 is an equidigital number, since it uses as much as digits as its factorization.

1296347917 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5379278.

The product of its digits is 571536, while the sum is 49.

The square root of 1296347917 is about 36004.8318562940. The cubic root of 1296347917 is about 1090.3699098013.

The spelling of 1296347917 in words is "one billion, two hundred ninety-six million, three hundred forty-seven thousand, nine hundred seventeen".