421808711 has 2 divisors, whose sum is σ = 421808712. Its totient is φ = 421808710.

The previous prime is 421808701. The next prime is 421808713. The reversal of 421808711 is 117808124.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-421808711 is a prime.

Together with 421808713, 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 (421808713) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 210904355 + 210904356.

It is an arithmetic number, because the mean of its divisors is an integer number (210904356).

Almost surely, 2^421808711 is an apocalyptic number.

421808711 is a deficient number, since it is larger than the sum of its proper divisors (1).

421808711 is an equidigital number, since it uses as much as digits as its factorization.

421808711 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3584, while the sum is 32.

The square root of 421808711 is about 20537.9821550219. The cubic root of 421808711 is about 749.9607155720.

The spelling of 421808711 in words is "four hundred twenty-one million, eight hundred eight thousand, seven hundred eleven".