634667 has 4 divisors (see below), whose sum is σ = 692376. Its totient is φ = 576960.

The previous prime is 634651. The next prime is 634679. The reversal of 634667 is 766436.

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 634667 - 2⁴ = 634651 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (634687) 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, 28838 + ... + 28859.

It is an arithmetic number, because the mean of its divisors is an integer number (173094).

2⁶³⁴⁶⁶⁷ is an apocalyptic number.

634667 is a deficient number, since it is larger than the sum of its proper divisors (57709).

634667 is a wasteful number, since it uses less digits than its factorization.

634667 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 57708.

The product of its digits is 18144, while the sum is 32.

The square root of 634667 is about 796.6599023423. The cubic root of 634667 is about 85.9373529694.

Subtracting 634667 from its reverse (766436), we obtain a square (131769 = 363²).

The spelling of 634667 in words is "six hundred thirty-four thousand, six hundred sixty-seven".