421386827 has 2 divisors, whose sum is σ = 421386828. Its totient is φ = 421386826.

The previous prime is 421386809. The next prime is 421386829. The reversal of 421386827 is 728683124.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 421386827 - 2²⁸ = 152951371 is a prime.

Together with 421386829, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (421386829) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 210693413 + 210693414.

It is an arithmetic number, because the mean of its divisors is an integer number (210693414).

Almost surely, 2^421386827 is an apocalyptic number.

421386827 is a deficient number, since it is larger than the sum of its proper divisors (1).

421386827 is an equidigital number, since it uses as much as digits as its factorization.

421386827 is an evil number, because the sum of its binary digits is even.

The product of its digits is 129024, while the sum is 41.

The square root of 421386827 is about 20527.7087615740. The cubic root of 421386827 is about 749.7106006413.

The spelling of 421386827 in words is "four hundred twenty-one million, three hundred eighty-six thousand, eight hundred twenty-seven".