634887 has 24 divisors (see below), whose sum is σ = 1027728. Its totient is φ = 377520.

The previous prime is 634871. The next prime is 634891. The reversal of 634887 is 788436.

It is not a de Polignac number, because 634887 - 2⁴ = 634871 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (634807) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 11953 + ... + 12005.

It is an arithmetic number, because the mean of its divisors is an integer number (42822).

2⁶³⁴⁸⁸⁷ is an apocalyptic number.

634887 is a deficient number, since it is larger than the sum of its proper divisors (392841).

634887 is a wasteful number, since it uses less digits than its factorization.

634887 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 92 (or 67 counting only the distinct ones).

The product of its digits is 32256, while the sum is 36.

The square root of 634887 is about 796.7979668649. The cubic root of 634887 is about 85.9472815533.

It can be divided in two parts, 634 and 887, that added together give a square (1521 = 39²).

The spelling of 634887 in words is "six hundred thirty-four thousand, eight hundred eighty-seven".