424003661 has 2 divisors, whose sum is σ = 424003662. Its totient is φ = 424003660.

The previous prime is 424003633. The next prime is 424003663. The reversal of 424003661 is 166300424.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 408282436 + 15721225 = 20206^2 + 3965^2 .

It is a cyclic number.

It is not a de Polignac number, because 424003661 - 2¹⁰ = 424002637 is a prime.

Together with 424003663, it forms a pair of twin primes.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 424003661.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (424003663) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 212001830 + 212001831.

It is an arithmetic number, because the mean of its divisors is an integer number (212001831).

Almost surely, 2^424003661 is an apocalyptic number.

It is an amenable number.

424003661 is a deficient number, since it is larger than the sum of its proper divisors (1).

424003661 is an equidigital number, since it uses as much as digits as its factorization.

424003661 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3456, while the sum is 26.

The square root of 424003661 is about 20591.3491787207. The cubic root of 424003661 is about 751.2593130647.

The spelling of 424003661 in words is "four hundred twenty-four million, three thousand, six hundred sixty-one".