634654 has 4 divisors (see below), whose sum is σ = 951984. Its totient is φ = 317326.

The previous prime is 634651. The next prime is 634679. The reversal of 634654 is 456436.

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

It is an Ulam number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (634651) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 158662 + ... + 158665.

It is an arithmetic number, because the mean of its divisors is an integer number (237996).

2⁶³⁴⁶⁵⁴ is an apocalyptic number.

634654 is a deficient number, since it is larger than the sum of its proper divisors (317330).

634654 is a wasteful number, since it uses less digits than its factorization.

634654 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 317329.

The product of its digits is 8640, while the sum is 28.

The square root of 634654 is about 796.6517432354. The cubic root of 634654 is about 85.9367662086.

It can be divided in two parts, 6346 and 54, that added together give a square (6400 = 80²).

The spelling of 634654 in words is "six hundred thirty-four thousand, six hundred fifty-four".