1326969689 has 2 divisors, whose sum is σ = 1326969690. Its totient is φ = 1326969688.

The previous prime is 1326969647. The next prime is 1326969727. The reversal of 1326969689 is 9869696231.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1275704089 + 51265600 = 35717^2 + 7160^2 .

It is a cyclic number.

It is not a de Polignac number, because 1326969689 - 2²⁸ = 1058534233 is a prime.

It is not a weakly prime, because it can be changed into another prime (1326969089) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 663484844 + 663484845.

It is an arithmetic number, because the mean of its divisors is an integer number (663484845).

Almost surely, 2^1326969689 is an apocalyptic number.

It is an amenable number.

1326969689 is a deficient number, since it is larger than the sum of its proper divisors (1).

1326969689 is an equidigital number, since it uses as much as digits as its factorization.

1326969689 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 7558272, while the sum is 59.

The square root of 1326969689 is about 36427.5951580666. The cubic root of 1326969689 is about 1098.8885989455. Note that the first 3 decimals are identical.

The spelling of 1326969689 in words is "one billion, three hundred twenty-six million, nine hundred sixty-nine thousand, six hundred eighty-nine".