1321607239 has 2 divisors, whose sum is σ = 1321607240. Its totient is φ = 1321607238.

The previous prime is 1321607197. The next prime is 1321607267. The reversal of 1321607239 is 9327061231.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1321607239 - 2²⁹ = 784736327 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1321607039) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 660803619 + 660803620.

It is an arithmetic number, because the mean of its divisors is an integer number (660803620).

Almost surely, 2^1321607239 is an apocalyptic number.

1321607239 is a deficient number, since it is larger than the sum of its proper divisors (1).

1321607239 is an equidigital number, since it uses as much as digits as its factorization.

1321607239 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 13608, while the sum is 34.

The square root of 1321607239 is about 36353.9164190050. The cubic root of 1321607239 is about 1097.4063518767.

The spelling of 1321607239 in words is "one billion, three hundred twenty-one million, six hundred seven thousand, two hundred thirty-nine".