1320780797 has 8 divisors (see below), whose sum is σ = 1510077696. Its totient is φ = 1131637392.

The previous prime is 1320780781. The next prime is 1320780827. The reversal of 1320780797 is 7970870231.

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

It is a cyclic number.

It is not a de Polignac number, because 1320780797 - 2⁴ = 1320780781 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1320780397) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 19298 + ... + 54899.

It is an arithmetic number, because the mean of its divisors is an integer number (188759712).

Almost surely, 2^1320780797 is an apocalyptic number.

It is an amenable number.

1320780797 is a deficient number, since it is larger than the sum of its proper divisors (189296899).

1320780797 is an equidigital number, since it uses as much as digits as its factorization.

1320780797 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 76747.

The product of its (nonzero) digits is 148176, while the sum is 44.

The square root of 1320780797 is about 36342.5480256957. The cubic root of 1320780797 is about 1097.1775567689.

The spelling of 1320780797 in words is "one billion, three hundred twenty million, seven hundred eighty thousand, seven hundred ninety-seven".