1313195132509 has 4 divisors (see below), whose sum is σ = 1414210142716. Its totient is φ = 1212180122304.

The previous prime is 1313195132507. The next prime is 1313195132539. The reversal of 1313195132509 is 9052315913131.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 114597144484 + 1198597988025 = 338522^2 + 1094805^2 .

It is a cyclic number.

It is not a de Polignac number, because 1313195132509 - 2¹ = 1313195132507 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1313195132507) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 50507505084 + ... + 50507505109.

It is an arithmetic number, because the mean of its divisors is an integer number (353552535679).

Almost surely, 2^{1313195132509} is an apocalyptic number.

It is an amenable number.

1313195132509 is a deficient number, since it is larger than the sum of its proper divisors (101015010207).

1313195132509 is a wasteful number, since it uses less digits than its factorization.

1313195132509 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 101015010206.

The product of its (nonzero) digits is 109350, while the sum is 43.

The spelling of 1313195132509 in words is "one trillion, three hundred thirteen billion, one hundred ninety-five million, one hundred thirty-two thousand, five hundred nine".