1323772543 has 4 divisors (see below), whose sum is σ = 1326536640. Its totient is φ = 1321008448.

The previous prime is 1323772517. The next prime is 1323772577. The reversal of 1323772543 is 3452773231.

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

It is a cyclic number.

It is not a de Polignac number, because 1323772543 - 2⁵ = 1323772511 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 (1323778543) 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, 1381330 + ... + 1382287.

It is an arithmetic number, because the mean of its divisors is an integer number (331634160).

Almost surely, 2^1323772543 is an apocalyptic number.

1323772543 is a deficient number, since it is larger than the sum of its proper divisors (2764097).

1323772543 is an equidigital number, since it uses as much as digits as its factorization.

1323772543 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2764096.

The product of its digits is 105840, while the sum is 37.

The square root of 1323772543 is about 36383.6851212188. The cubic root of 1323772543 is about 1098.0053502658.

The spelling of 1323772543 in words is "one billion, three hundred twenty-three million, seven hundred seventy-two thousand, five hundred forty-three".