1320704623 has 16 divisors (see below), whose sum is σ = 1556684800. Its totient is φ = 1096968096.

The previous prime is 1320704621. The next prime is 1320704629. The reversal of 1320704623 is 3264070231.

It is not a de Polignac number, because 1320704623 - 2¹ = 1320704621 is a prime.

It is the 36342-nd Hogben number.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1320704591 and 1320704600.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1320704621) by changing a digit.

It is a nontrivial repunit in base 36341.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 20953 + ... + 55501.

It is an arithmetic number, because the mean of its divisors is an integer number (97292800).

Almost surely, 2^1320704623 is an apocalyptic number.

1320704623 is a deficient number, since it is larger than the sum of its proper divisors (235980177).

1320704623 is a wasteful number, since it uses less digits than its factorization.

1320704623 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34726.

The product of its (nonzero) digits is 6048, while the sum is 28.

The square root of 1320704623 is about 36341.5000103188. The cubic root of 1320704623 is about 1097.1564636876.

Adding to 1320704623 its reverse (3264070231), we get a palindrome (4584774854).

The spelling of 1320704623 in words is "one billion, three hundred twenty million, seven hundred four thousand, six hundred twenty-three".