1326897613 has 2 divisors, whose sum is σ = 1326897614. Its totient is φ = 1326897612.

The previous prime is 1326897599. The next prime is 1326897631. The reversal of 1326897613 is 3167986231.

1326897613 = 25757² + 25758².

Together with next prime (1326897631) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 663474564 + 663423049 = 25758^2 + 25757^2 .

It is a cyclic number.

It is not a de Polignac number, because 1326897613 - 2⁹ = 1326897101 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1326897643) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 663448806 + 663448807.

It is an arithmetic number, because the mean of its divisors is an integer number (663448807).

Almost surely, 2^1326897613 is an apocalyptic number.

1326897613 is the 25758-th centered square number.

It is an amenable number.

1326897613 is a deficient number, since it is larger than the sum of its proper divisors (1).

1326897613 is an equidigital number, since it uses as much as digits as its factorization.

1326897613 is an evil number, because the sum of its binary digits is even.

The product of its digits is 326592, while the sum is 46.

The square root of 1326897613 is about 36426.6058396881. The cubic root of 1326897613 is about 1098.8687027541.

The spelling of 1326897613 in words is "one billion, three hundred twenty-six million, eight hundred ninety-seven thousand, six hundred thirteen".