424053821 has 2 divisors, whose sum is σ = 424053822. Its totient is φ = 424053820.

The previous prime is 424053809. The next prime is 424053823. The reversal of 424053821 is 128350424.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 286929721 + 137124100 = 16939^2 + 11710^2 .

It is a cyclic number.

It is not a de Polignac number, because 424053821 - 2⁶ = 424053757 is a prime.

Together with 424053823, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (424053823) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 212026910 + 212026911.

It is an arithmetic number, because the mean of its divisors is an integer number (212026911).

Almost surely, 2^424053821 is an apocalyptic number.

It is an amenable number.

424053821 is a deficient number, since it is larger than the sum of its proper divisors (1).

424053821 is an equidigital number, since it uses as much as digits as its factorization.

424053821 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 7680, while the sum is 29.

The square root of 424053821 is about 20592.5671299136. The cubic root of 424053821 is about 751.2889367722.

The spelling of 424053821 in words is "four hundred twenty-four million, fifty-three thousand, eight hundred twenty-one".