424430344721 has 2 divisors, whose sum is σ = 424430344722. Its totient is φ = 424430344720.

The previous prime is 424430344699. The next prime is 424430344817. The reversal of 424430344721 is 127443034424.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 328602951121 + 95827393600 = 573239^2 + 309560^2 .

It is a cyclic number.

It is not a de Polignac number, because 424430344721 - 2³⁰ = 423356602897 is a prime.

It is a super-2 number, since 2×424430344721² (a number of 24 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (424430344421) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 212215172360 + 212215172361.

It is an arithmetic number, because the mean of its divisors is an integer number (212215172361).

Almost surely, 2^424430344721 is an apocalyptic number.

It is an amenable number.

424430344721 is a deficient number, since it is larger than the sum of its proper divisors (1).

424430344721 is an equidigital number, since it uses as much as digits as its factorization.

424430344721 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 258048, while the sum is 38.

The spelling of 424430344721 in words is "four hundred twenty-four billion, four hundred thirty million, three hundred forty-four thousand, seven hundred twenty-one".