323661563 has 2 divisors, whose sum is σ = 323661564. Its totient is φ = 323661562.

The previous prime is 323661557. The next prime is 323661577. The reversal of 323661563 is 365166323.

It is a weak prime.

It is an emirp because it is prime and its reverse (365166323) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 323661563 - 2¹⁰ = 323660539 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (323661263) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 161830781 + 161830782.

It is an arithmetic number, because the mean of its divisors is an integer number (161830782).

Almost surely, 2^323661563 is an apocalyptic number.

323661563 is a deficient number, since it is larger than the sum of its proper divisors (1).

323661563 is an equidigital number, since it uses as much as digits as its factorization.

323661563 is an evil number, because the sum of its binary digits is even.

The product of its digits is 58320, while the sum is 35.

The square root of 323661563 is about 17990.5965159580. The cubic root of 323661563 is about 686.5893179860.

The spelling of 323661563 in words is "three hundred twenty-three million, six hundred sixty-one thousand, five hundred sixty-three".