1296643393 has 8 divisors (see below), whose sum is σ = 1317081600. Its totient is φ = 1276265760.

The previous prime is 1296643367. The next prime is 1296643421. The reversal of 1296643393 is 3933466921.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1296643393 is a prime.

It is a super-2 number, since 2×1296643393² = 3362568177221104898, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1296643343) 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 7 ways as a sum of consecutive naturals, for example, 29008 + ... + 58606.

It is an arithmetic number, because the mean of its divisors is an integer number (164635200).

Almost surely, 2^1296643393 is an apocalyptic number.

It is an amenable number.

1296643393 is a deficient number, since it is larger than the sum of its proper divisors (20438207).

1296643393 is an equidigital number, since it uses as much as digits as its factorization.

1296643393 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30287.

The product of its digits is 629856, while the sum is 46.

The square root of 1296643393 is about 36008.9349051038. The cubic root of 1296643393 is about 1090.4527460163.

The spelling of 1296643393 in words is "one billion, two hundred ninety-six million, six hundred forty-three thousand, three hundred ninety-three".