1320559289 has 8 divisors (see below), whose sum is σ = 1537686720. Its totient is φ = 1110550896.

The previous prime is 1320559277. The next prime is 1320559301. The reversal of 1320559289 is 9829550231.

It is an interprime number because it is at equal distance from previous prime (1320559277) and next prime (1320559301).

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1320559289 - 2²⁸ = 1052123833 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1320559249) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1779359 + ... + 1780100.

It is an arithmetic number, because the mean of its divisors is an integer number (192210840).

Almost surely, 2^1320559289 is an apocalyptic number.

It is an amenable number.

1320559289 is a deficient number, since it is larger than the sum of its proper divisors (217127431).

1320559289 is an equidigital number, since it uses as much as digits as its factorization.

1320559289 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3559519.

The product of its (nonzero) digits is 194400, while the sum is 44.

The square root of 1320559289 is about 36339.5003955751. The cubic root of 1320559289 is about 1097.1162174978.

The spelling of 1320559289 in words is "one billion, three hundred twenty million, five hundred fifty-nine thousand, two hundred eighty-nine".