1323206523 has 20 divisors (see below), whose sum is σ = 1992221440. Its totient is φ = 875184912.

The previous prime is 1323206513. The next prime is 1323206539. The reversal of 1323206523 is 3256023231.

1323206523 is a `hidden beast` number, since 1 + 3 + 2 + 3 + 2 + 0 + 652 + 3 = 666.

It is not a de Polignac number, because 1323206523 - 2⁸ = 1323206267 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1323206513) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 54028 + ... + 74601.

It is an arithmetic number, because the mean of its divisors is an integer number (99611072).

Almost surely, 2^1323206523 is an apocalyptic number.

1323206523 is a deficient number, since it is larger than the sum of its proper divisors (669014917).

1323206523 is a wasteful number, since it uses less digits than its factorization.

1323206523 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 128768 (or 128759 counting only the distinct ones).

The product of its (nonzero) digits is 6480, while the sum is 27.

The square root of 1323206523 is about 36375.9058031549. The cubic root of 1323206523 is about 1097.8488325438.

Adding to 1323206523 its reverse (3256023231), we get a palindrome (4579229754).

The spelling of 1323206523 in words is "one billion, three hundred twenty-three million, two hundred six thousand, five hundred twenty-three".