634869 has 12 divisors (see below), whose sum is σ = 957216. Its totient is φ = 404712.

The previous prime is 634861. The next prime is 634871. The reversal of 634869 is 968436.

It is not a de Polignac number, because 634869 - 2³ = 634861 is a prime.

It is a super-2 number, since 2×634869² = 806117294322, which contains 22 as substring.

It is a congruent number.

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 11 ways as a sum of consecutive naturals, for example, 1327 + ... + 1740.

It is an arithmetic number, because the mean of its divisors is an integer number (79768).

2⁶³⁴⁸⁶⁹ is an apocalyptic number.

634869 is a gapful number since it is divisible by the number (69) formed by its first and last digit.

It is an amenable number.

634869 is a deficient number, since it is larger than the sum of its proper divisors (322347).

634869 is a wasteful number, since it uses less digits than its factorization.

634869 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3096 (or 3093 counting only the distinct ones).

The product of its digits is 31104, while the sum is 36.

The square root of 634869 is about 796.7866715753. The cubic root of 634869 is about 85.9464693008.

The spelling of 634869 in words is "six hundred thirty-four thousand, eight hundred sixty-nine".