427879 has 2 divisors, whose sum is σ = 427880. Its totient is φ = 427878.

The previous prime is 427877. The next prime is 427883. The reversal of 427879 is 978724.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 427879 - 2¹ = 427877 is a prime.

Together with 427877, it forms a pair of twin primes.

427879 is a lucky number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (427877) 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 as a sum of consecutive naturals, namely, 213939 + 213940.

It is an arithmetic number, because the mean of its divisors is an integer number (213940).

2⁴²⁷⁸⁷⁹ is an apocalyptic number.

427879 is a deficient number, since it is larger than the sum of its proper divisors (1).

427879 is an equidigital number, since it uses as much as digits as its factorization.

427879 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 28224, while the sum is 37.

The square root of 427879 is about 654.1246058665. The cubic root of 427879 is about 75.3541179673.

It can be divided in two parts, 42 and 7879, that added together give a square (7921 = 89²).

The spelling of 427879 in words is "four hundred twenty-seven thousand, eight hundred seventy-nine".