1326906643 has 2 divisors, whose sum is σ = 1326906644. Its totient is φ = 1326906642.

The previous prime is 1326906613. The next prime is 1326906701. The reversal of 1326906643 is 3466096231.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1326906643 - 2⁹ = 1326906131 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1326906596 and 1326906605.

It is not a weakly prime, because it can be changed into another prime (1326906613) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 663453321 + 663453322.

It is an arithmetic number, because the mean of its divisors is an integer number (663453322).

Almost surely, 2^1326906643 is an apocalyptic number.

1326906643 is a deficient number, since it is larger than the sum of its proper divisors (1).

1326906643 is an equidigital number, since it uses as much as digits as its factorization.

1326906643 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 139968, while the sum is 40.

The square root of 1326906643 is about 36426.7297873416. The cubic root of 1326906643 is about 1098.8711954764.

The spelling of 1326906643 in words is "one billion, three hundred twenty-six million, nine hundred six thousand, six hundred forty-three".