423334661 has 2 divisors, whose sum is σ = 423334662. Its totient is φ = 423334660.

The previous prime is 423334651. The next prime is 423334727. The reversal of 423334661 is 166433324.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 420004036 + 3330625 = 20494^2 + 1825^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-423334661 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (423334631) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 211667330 + 211667331.

It is an arithmetic number, because the mean of its divisors is an integer number (211667331).

Almost surely, 2^423334661 is an apocalyptic number.

It is an amenable number.

423334661 is a deficient number, since it is larger than the sum of its proper divisors (1).

423334661 is an equidigital number, since it uses as much as digits as its factorization.

423334661 is an evil number, because the sum of its binary digits is even.

The product of its digits is 31104, while the sum is 32.

The square root of 423334661 is about 20575.0980799606. The cubic root of 423334661 is about 750.8639886123.

Adding to 423334661 its reverse (166433324), we get a palindrome (589767985).

The spelling of 423334661 in words is "four hundred twenty-three million, three hundred thirty-four thousand, six hundred sixty-one".