430423621 has 2 divisors, whose sum is σ = 430423622. Its totient is φ = 430423620.

The previous prime is 430423619. The next prime is 430423649. The reversal of 430423621 is 126324034.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 428697025 + 1726596 = 20705^2 + 1314^2 .

It is a cyclic number.

It is not a de Polignac number, because 430423621 - 2¹ = 430423619 is a prime.

Together with 430423619, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (430423681) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 215211810 + 215211811.

It is an arithmetic number, because the mean of its divisors is an integer number (215211811).

Almost surely, 2^430423621 is an apocalyptic number.

It is an amenable number.

430423621 is a deficient number, since it is larger than the sum of its proper divisors (1).

430423621 is an equidigital number, since it uses as much as digits as its factorization.

430423621 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 25.

The square root of 430423621 is about 20746.6532481748. The cubic root of 430423621 is about 755.0320124432.

Adding to 430423621 its reverse (126324034), we get a palindrome (556747655).

The spelling of 430423621 in words is "four hundred thirty million, four hundred twenty-three thousand, six hundred twenty-one".