1320513897 has 4 divisors (see below), whose sum is σ = 1760685200. Its totient is φ = 880342596.

The previous prime is 1320513893. The next prime is 1320513907. The reversal of 1320513897 is 7983150231.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 1320513897 - 2² = 1320513893 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1320513893) 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 in 3 ways as a sum of consecutive naturals, for example, 220085647 + ... + 220085652.

It is an arithmetic number, because the mean of its divisors is an integer number (440171300).

Almost surely, 2^1320513897 is an apocalyptic number.

It is an amenable number.

1320513897 is a deficient number, since it is larger than the sum of its proper divisors (440171303).

1320513897 is an equidigital number, since it uses as much as digits as its factorization.

1320513897 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 440171302.

The product of its (nonzero) digits is 45360, while the sum is 39.

The square root of 1320513897 is about 36338.8758356667. The cubic root of 1320513897 is about 1097.1036468468.

The spelling of 1320513897 in words is "one billion, three hundred twenty million, five hundred thirteen thousand, eight hundred ninety-seven".