1305320520089 has 2 divisors, whose sum is σ = 1305320520090. Its totient is φ = 1305320520088.

The previous prime is 1305320520067. The next prime is 1305320520107. The reversal of 1305320520089 is 9800250235031.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1206845059225 + 98475460864 = 1098565^2 + 313808^2 .

It is a cyclic number.

It is not a de Polignac number, because 1305320520089 - 2²⁰ = 1305319471513 is a prime.

It is not a weakly prime, because it can be changed into another prime (1305320520989) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 652660260044 + 652660260045.

It is an arithmetic number, because the mean of its divisors is an integer number (652660260045).

Almost surely, 2^{1305320520089} is an apocalyptic number.

It is an amenable number.

1305320520089 is a deficient number, since it is larger than the sum of its proper divisors (1).

1305320520089 is an equidigital number, since it uses as much as digits as its factorization.

1305320520089 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 64800, while the sum is 38.

The spelling of 1305320520089 in words is "one trillion, three hundred five billion, three hundred twenty million, five hundred twenty thousand, eighty-nine".