1321109347 has 2 divisors, whose sum is σ = 1321109348. Its totient is φ = 1321109346.

The previous prime is 1321109327. The next prime is 1321109353. The reversal of 1321109347 is 7439011231.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1321109347 is a prime.

It is not a weakly prime, because it can be changed into another prime (1321109327) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 660554673 + 660554674.

It is an arithmetic number, because the mean of its divisors is an integer number (660554674).

Almost surely, 2^1321109347 is an apocalyptic number.

1321109347 is a deficient number, since it is larger than the sum of its proper divisors (1).

1321109347 is an equidigital number, since it uses as much as digits as its factorization.

1321109347 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4536, while the sum is 31.

The square root of 1321109347 is about 36347.0679285138. The cubic root of 1321109347 is about 1097.2685251317.

The spelling of 1321109347 in words is "one billion, three hundred twenty-one million, one hundred nine thousand, three hundred forty-seven".