1303389838921 has 3 divisors (see below), whose sum is σ = 1303390980583. Its totient is φ = 1303388697260.

The previous prime is 1303389838909. The next prime is 1303389838931. The reversal of 1303389838921 is 1298389833031.

The square root of 1303389838921 is 1141661.

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 can be written as a sum of positive squares in only one way, i.e., 14211262521 + 1289178576400 = 119211^2 + 1135420^2 .

It is not a de Polignac number, because 1303389838921 - 2⁹ = 1303389838409 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1303389838931) 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, 570831 + ... + 1712491.

Almost surely, 2^{1303389838921} is an apocalyptic number.

1303389838921 is the 1141661-st square number.

1303389838921 is the 570831-st centered octagonal number.

It is an amenable number.

1303389838921 is a deficient number, since it is larger than the sum of its proper divisors (1141662).

1303389838921 is an frugal number, since it uses more digits than its factorization.

1303389838921 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2283322 (or 1141661 counting only the distinct ones).

The product of its (nonzero) digits is 6718464, while the sum is 58.

The spelling of 1303389838921 in words is "one trillion, three hundred three billion, three hundred eighty-nine million, eight hundred thirty-eight thousand, nine hundred twenty-one".