427631 has 4 divisors (see below), whose sum is σ = 430200. Its totient is φ = 425064.

The previous prime is 427621. The next prime is 427681. The reversal of 427631 is 136724.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-427631 is a prime.

It is a super-2 number, since 2×427631² = 365736544322, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 427597 and 427606.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (427621) 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, 1016 + ... + 1373.

It is an arithmetic number, because the mean of its divisors is an integer number (107550).

2⁴²⁷⁶³¹ is an apocalyptic number.

427631 is a deficient number, since it is larger than the sum of its proper divisors (2569).

427631 is a wasteful number, since it uses less digits than its factorization.

427631 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2568.

The product of its digits is 1008, while the sum is 23.

The square root of 427631 is about 653.9350120616. The cubic root of 427631 is about 75.3395566599.

The spelling of 427631 in words is "four hundred twenty-seven thousand, six hundred thirty-one".