634863 has 8 divisors (see below), whose sum is σ = 850176. Its totient is φ = 421400.

The previous prime is 634861. The next prime is 634871. The reversal of 634863 is 368436.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 634863 - 2¹ = 634861 is a prime.

634863 is a lucky number.

It is a self number, because there is not a number n which added to its sum of digits gives 634863.

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 7 ways as a sum of consecutive naturals, for example, 1048 + ... + 1538.

It is an arithmetic number, because the mean of its divisors is an integer number (106272).

2⁶³⁴⁸⁶³ is an apocalyptic number.

634863 is a deficient number, since it is larger than the sum of its proper divisors (215313).

634863 is a wasteful number, since it uses less digits than its factorization.

634863 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 925.

The product of its digits is 10368, while the sum is 30.

The square root of 634863 is about 796.7829064432. The cubic root of 634863 is about 85.9461985465.

The spelling of 634863 in words is "six hundred thirty-four thousand, eight hundred sixty-three".