1296943633 has 4 divisors (see below), whose sum is σ = 1298967588. Its totient is φ = 1294919680.

The previous prime is 1296943579. The next prime is 1296943643. The reversal of 1296943633 is 3363496921.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 3363496921 = 54059 ⋅62219.

It can be written as a sum of positive squares in 2 ways, for example, as 588159504 + 708784129 = 24252^2 + 26623^2 .

It is a cyclic number.

It is not a de Polignac number, because 1296943633 - 2²¹ = 1294846481 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1296943643) 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, 1011016 + ... + 1012297.

It is an arithmetic number, because the mean of its divisors is an integer number (324741897).

Almost surely, 2^1296943633 is an apocalyptic number.

It is an amenable number.

1296943633 is a deficient number, since it is larger than the sum of its proper divisors (2023955).

1296943633 is an equidigital number, since it uses as much as digits as its factorization.

1296943633 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2023954.

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

The square root of 1296943633 is about 36013.1036290959. The cubic root of 1296943633 is about 1090.5369049217.

The spelling of 1296943633 in words is "one billion, two hundred ninety-six million, nine hundred forty-three thousand, six hundred thirty-three".