427979 has 8 divisors (see below), whose sum is σ = 451440. Its totient is φ = 405216.

The previous prime is 427969. The next prime is 427991. The reversal of 427979 is 979724.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 427979 - 2⁸ = 427723 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (427919) 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 7 ways as a sum of consecutive naturals, for example, 1457 + ... + 1725.

It is an arithmetic number, because the mean of its divisors is an integer number (56430).

2⁴²⁷⁹⁷⁹ is an apocalyptic number.

427979 is a deficient number, since it is larger than the sum of its proper divisors (23461).

427979 is a wasteful number, since it uses less digits than its factorization.

427979 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 349.

The product of its digits is 31752, while the sum is 38.

The square root of 427979 is about 654.2010394367. The cubic root of 427979 is about 75.3599878704.

The spelling of 427979 in words is "four hundred twenty-seven thousand, nine hundred seventy-nine".