1313506242889 has 3 divisors (see below), whose sum is σ = 1313507388973. Its totient is φ = 1313505096806.

The previous prime is 1313506242869. The next prime is 1313506242913. The reversal of 1313506242889 is 9882426053131.

The square root of 1313506242889 is 1146083.

It is a perfect power (a square), and thus also a powerful number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is not a de Polignac number, because 1313506242889 - 2¹¹ = 1313506240841 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1313506242869) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 573042 + ... + 1719124.

Almost surely, 2^{1313506242889} is an apocalyptic number.

1313506242889 is the 1146083-rd square number.

1313506242889 is the 573042-nd centered octagonal number.

It is an amenable number.

1313506242889 is a deficient number, since it is larger than the sum of its proper divisors (1146084).

1313506242889 is an frugal number, since it uses more digits than its factorization.

1313506242889 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2292166 (or 1146083 counting only the distinct ones).

The product of its (nonzero) digits is 2488320, while the sum is 52.

The spelling of 1313506242889 in words is "one trillion, three hundred thirteen billion, five hundred six million, two hundred forty-two thousand, eight hundred eighty-nine".