1321403339 has 2 divisors, whose sum is σ = 1321403340. Its totient is φ = 1321403338.

The previous prime is 1321403333. The next prime is 1321403341. The reversal of 1321403339 is 9333041231.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1321403339 - 2⁴ = 1321403323 is a prime.

It is a super-2 number, since 2×1321403339² = 3492213568640697842, which contains 22 as substring.

Together with 1321403341, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (1321403333) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 660701669 + 660701670.

It is an arithmetic number, because the mean of its divisors is an integer number (660701670).

Almost surely, 2^1321403339 is an apocalyptic number.

1321403339 is a deficient number, since it is larger than the sum of its proper divisors (1).

1321403339 is an equidigital number, since it uses as much as digits as its factorization.

1321403339 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5832, while the sum is 29.

The square root of 1321403339 is about 36351.1119362256. Note that the first 3 decimals coincide. The cubic root of 1321403339 is about 1097.3499123494.

The spelling of 1321403339 in words is "one billion, three hundred twenty-one million, four hundred three thousand, three hundred thirty-nine".