1321305907 has 2 divisors, whose sum is σ = 1321305908. Its totient is φ = 1321305906.

The previous prime is 1321305833. The next prime is 1321305911. The reversal of 1321305907 is 7095031231.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1321305907 - 2²³ = 1312917299 is a prime.

It is not a weakly prime, because it can be changed into another prime (1321305107) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 660652953 + 660652954.

It is an arithmetic number, because the mean of its divisors is an integer number (660652954).

Almost surely, 2^1321305907 is an apocalyptic number.

1321305907 is a deficient number, since it is larger than the sum of its proper divisors (1).

1321305907 is an equidigital number, since it uses as much as digits as its factorization.

1321305907 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5670, while the sum is 31.

The square root of 1321305907 is about 36349.7717599437. The cubic root of 1321305907 is about 1097.3229411183.

The spelling of 1321305907 in words is "one billion, three hundred twenty-one million, three hundred five thousand, nine hundred seven".