1320364673 has 4 divisors (see below), whose sum is σ = 1345277268. Its totient is φ = 1295452080.

The previous prime is 1320364637. The next prime is 1320364691. The reversal of 1320364673 is 3764630231.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 998054464 + 322310209 = 31592^2 + 17953^2 .

It is a cyclic number.

It is not a de Polignac number, because 1320364673 - 2¹⁸ = 1320102529 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1320364273) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12456218 + ... + 12456323.

It is an arithmetic number, because the mean of its divisors is an integer number (336319317).

Almost surely, 2^1320364673 is an apocalyptic number.

It is an amenable number.

1320364673 is a deficient number, since it is larger than the sum of its proper divisors (24912595).

1320364673 is an equidigital number, since it uses as much as digits as its factorization.

1320364673 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24912594.

The product of its (nonzero) digits is 54432, while the sum is 35.

The square root of 1320364673 is about 36336.8225495846. The cubic root of 1320364673 is about 1097.0623194105.

The spelling of 1320364673 in words is "one billion, three hundred twenty million, three hundred sixty-four thousand, six hundred seventy-three".