421879827 has 4 divisors (see below), whose sum is σ = 562506440. Its totient is φ = 281253216.

The previous prime is 421879807. The next prime is 421879877. The reversal of 421879827 is 728978124.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 421879827 - 2⁸ = 421879571 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (421879807) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 70313302 + ... + 70313307.

It is an arithmetic number, because the mean of its divisors is an integer number (140626610).

Almost surely, 2^421879827 is an apocalyptic number.

421879827 is a deficient number, since it is larger than the sum of its proper divisors (140626613).

421879827 is a wasteful number, since it uses less digits than its factorization.

421879827 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 140626612.

The product of its digits is 451584, while the sum is 48.

The square root of 421879827 is about 20539.7134108536. The cubic root of 421879827 is about 750.0028604335.

The spelling of 421879827 in words is "four hundred twenty-one million, eight hundred seventy-nine thousand, eight hundred twenty-seven".