320542823 has 2 divisors, whose sum is σ = 320542824. Its totient is φ = 320542822.

The previous prime is 320542819. The next prime is 320542847. The reversal of 320542823 is 328245023.

It is a weak prime.

It is an emirp because it is prime and its reverse (328245023) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 320542823 - 2² = 320542819 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (320542723) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 160271411 + 160271412.

It is an arithmetic number, because the mean of its divisors is an integer number (160271412).

Almost surely, 2^320542823 is an apocalyptic number.

320542823 is a deficient number, since it is larger than the sum of its proper divisors (1).

320542823 is an equidigital number, since it uses as much as digits as its factorization.

320542823 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 11520, while the sum is 29.

The square root of 320542823 is about 17903.7097552435. The cubic root of 320542823 is about 684.3769161362.

Adding to 320542823 its reverse (328245023), we get a palindrome (648787846).

The spelling of 320542823 in words is "three hundred twenty million, five hundred forty-two thousand, eight hundred twenty-three".