1320204859 has 2 divisors, whose sum is σ = 1320204860. Its totient is φ = 1320204858.

The previous prime is 1320204857. The next prime is 1320204863. The reversal of 1320204859 is 9584020231.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1320204859 - 2¹ = 1320204857 is a prime.

Together with 1320204857, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (1320204857) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 660102429 + 660102430.

It is an arithmetic number, because the mean of its divisors is an integer number (660102430).

Almost surely, 2^1320204859 is an apocalyptic number.

1320204859 is a deficient number, since it is larger than the sum of its proper divisors (1).

1320204859 is an equidigital number, since it uses as much as digits as its factorization.

1320204859 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 17280, while the sum is 34.

The square root of 1320204859 is about 36334.6234189925. The cubic root of 1320204859 is about 1097.0180556312.

The spelling of 1320204859 in words is "one billion, three hundred twenty million, two hundred four thousand, eight hundred fifty-nine".