421424327 has 2 divisors, whose sum is σ = 421424328. Its totient is φ = 421424326.

The previous prime is 421424321. The next prime is 421424329. The reversal of 421424327 is 723424124.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 421424327 - 2²⁰ = 420375751 is a prime.

Together with 421424329, 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 421424327.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (421424321) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 210712163 + 210712164.

It is an arithmetic number, because the mean of its divisors is an integer number (210712164).

Almost surely, 2^421424327 is an apocalyptic number.

421424327 is a deficient number, since it is larger than the sum of its proper divisors (1).

421424327 is an equidigital number, since it uses as much as digits as its factorization.

421424327 is an evil number, because the sum of its binary digits is even.

The product of its digits is 10752, while the sum is 29.

The square root of 421424327 is about 20528.6221408062. The cubic root of 421424327 is about 749.7328393634.

The spelling of 421424327 in words is "four hundred twenty-one million, four hundred twenty-four thousand, three hundred twenty-seven".