424007621 has 2 divisors, whose sum is σ = 424007622. Its totient is φ = 424007620.

The previous prime is 424007593. The next prime is 424007627. The reversal of 424007621 is 126700424.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 227587396 + 196420225 = 15086^2 + 14015^2 .

It is a cyclic number.

It is not a de Polignac number, because 424007621 - 2²⁶ = 356898757 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (424007627) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 212003810 + 212003811.

It is an arithmetic number, because the mean of its divisors is an integer number (212003811).

Almost surely, 2^424007621 is an apocalyptic number.

It is an amenable number.

424007621 is a deficient number, since it is larger than the sum of its proper divisors (1).

424007621 is an equidigital number, since it uses as much as digits as its factorization.

424007621 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2688, while the sum is 26.

The square root of 424007621 is about 20591.4453353814. The cubic root of 424007621 is about 751.2616518634.

The spelling of 424007621 in words is "four hundred twenty-four million, seven thousand, six hundred twenty-one".