1325912789 has 2 divisors, whose sum is σ = 1325912790. Its totient is φ = 1325912788.

The previous prime is 1325912779. The next prime is 1325912801. The reversal of 1325912789 is 9872195231.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 757900900 + 568011889 = 27530^2 + 23833^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1325912789 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1325912719) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 662956394 + 662956395.

It is an arithmetic number, because the mean of its divisors is an integer number (662956395).

Almost surely, 2^1325912789 is an apocalyptic number.

It is an amenable number.

1325912789 is a deficient number, since it is larger than the sum of its proper divisors (1).

1325912789 is an equidigital number, since it uses as much as digits as its factorization.

1325912789 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 272160, while the sum is 47.

The square root of 1325912789 is about 36413.0854089570. The cubic root of 1325912789 is about 1098.5967751877.

The spelling of 1325912789 in words is "one billion, three hundred twenty-five million, nine hundred twelve thousand, seven hundred eighty-nine".