1325598917 has 2 divisors, whose sum is σ = 1325598918. Its totient is φ = 1325598916.

The previous prime is 1325598881. The next prime is 1325598943. The reversal of 1325598917 is 7198955231.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1311453796 + 14145121 = 36214^2 + 3761^2 .

It is a cyclic number.

It is not a de Polignac number, because 1325598917 - 2⁶ = 1325598853 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1325595917) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 662799458 + 662799459.

It is an arithmetic number, because the mean of its divisors is an integer number (662799459).

Almost surely, 2^1325598917 is an apocalyptic number.

It is an amenable number.

1325598917 is a deficient number, since it is larger than the sum of its proper divisors (1).

1325598917 is an equidigital number, since it uses as much as digits as its factorization.

1325598917 is an evil number, because the sum of its binary digits is even.

The product of its digits is 680400, while the sum is 50.

The square root of 1325598917 is about 36408.7752746505. The cubic root of 1325598917 is about 1098.5100812055.

The spelling of 1325598917 in words is "one billion, three hundred twenty-five million, five hundred ninety-eight thousand, nine hundred seventeen".