427709 has 4 divisors (see below), whose sum is σ = 450240. Its totient is φ = 405180.

The previous prime is 427681. The next prime is 427711. The reversal of 427709 is 907724.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-427709 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (427789) 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, 11237 + ... + 11274.

It is an arithmetic number, because the mean of its divisors is an integer number (112560).

2⁴²⁷⁷⁰⁹ is an apocalyptic number.

It is an amenable number.

427709 is a deficient number, since it is larger than the sum of its proper divisors (22531).

427709 is a wasteful number, since it uses less digits than its factorization.

427709 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22530.

The product of its (nonzero) digits is 3528, while the sum is 29.

The square root of 427709 is about 653.9946482961. The cubic root of 427709 is about 75.3441370327.

The spelling of 427709 in words is "four hundred twenty-seven thousand, seven hundred nine".