634427 has 4 divisors (see below), whose sum is σ = 645240. Its totient is φ = 623616.

The previous prime is 634421. The next prime is 634441. The reversal of 634427 is 724436.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 634427 - 2¹⁶ = 568891 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 634396 and 634405.

It is not an unprimeable number, because it can be changed into a prime (634421) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5318 + ... + 5435.

It is an arithmetic number, because the mean of its divisors is an integer number (161310).

2⁶³⁴⁴²⁷ is an apocalyptic number.

634427 is a deficient number, since it is larger than the sum of its proper divisors (10813).

634427 is a wasteful number, since it uses less digits than its factorization.

634427 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10812.

The product of its digits is 4032, while the sum is 26.

The square root of 634427 is about 796.5092592054. The cubic root of 634427 is about 85.9265191700.

Subtracting 634427 from its reverse (724436), we obtain a palindrome (90009).

The spelling of 634427 in words is "six hundred thirty-four thousand, four hundred twenty-seven".