1321616339 has 4 divisors (see below), whose sum is σ = 1341342024. Its totient is φ = 1301890656.

The previous prime is 1321616327. The next prime is 1321616393. The reversal of 1321616339 is 9336161231.

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

It is a cyclic number.

It is not a de Polignac number, because 1321616339 - 2⁸ = 1321616083 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1321616299 and 1321616308.

It is not an unprimeable number, because it can be changed into a prime (1321616239) 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, 9862742 + ... + 9862875.

It is an arithmetic number, because the mean of its divisors is an integer number (335335506).

Almost surely, 2^1321616339 is an apocalyptic number.

1321616339 is a deficient number, since it is larger than the sum of its proper divisors (19725685).

1321616339 is an equidigital number, since it uses as much as digits as its factorization.

1321616339 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19725684.

The product of its digits is 17496, while the sum is 35.

The square root of 1321616339 is about 36354.0415772442. The cubic root of 1321616339 is about 1097.4088706217.

The spelling of 1321616339 in words is "one billion, three hundred twenty-one million, six hundred sixteen thousand, three hundred thirty-nine".