634867 has 4 divisors (see below), whose sum is σ = 642600. Its totient is φ = 627136.

The previous prime is 634861. The next prime is 634871. The reversal of 634867 is 768436.

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 634867 - 2³ = 634859 is a prime.

It is a super-2 number, since 2×634867² = 806112215378, which contains 22 as substring.

It is a Duffinian number.

It is a plaindrome in base 9.

It is a zygodrome in base 9.

It is not an unprimeable number, because it can be changed into a prime (634861) 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, 3742 + ... + 3907.

It is an arithmetic number, because the mean of its divisors is an integer number (160650).

2⁶³⁴⁸⁶⁷ is an apocalyptic number.

634867 is a deficient number, since it is larger than the sum of its proper divisors (7733).

634867 is an equidigital number, since it uses as much as digits as its factorization.

634867 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7732.

The product of its digits is 24192, while the sum is 34.

The square root of 634867 is about 796.7854165332. The cubic root of 634867 is about 85.9463790495.

The spelling of 634867 in words is "six hundred thirty-four thousand, eight hundred sixty-seven".