523667321 has 4 divisors (see below), whose sum is σ = 523714944. Its totient is φ = 523619700.

The previous prime is 523667273. The next prime is 523667323. The reversal of 523667321 is 123766325.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-523667321 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (523667323) 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, 2036 + ... + 32426.

It is an arithmetic number, because the mean of its divisors is an integer number (130928736).

Almost surely, 2^523667321 is an apocalyptic number.

It is an amenable number.

523667321 is a deficient number, since it is larger than the sum of its proper divisors (47623).

523667321 is a wasteful number, since it uses less digits than its factorization.

523667321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 47622.

The product of its digits is 45360, while the sum is 35.

The square root of 523667321 is about 22883.7785559990. The cubic root of 523667321 is about 806.0311470086.

The spelling of 523667321 in words is "five hundred twenty-three million, six hundred sixty-seven thousand, three hundred twenty-one".