634487 has 4 divisors (see below), whose sum is σ = 725136. Its totient is φ = 543840.

The previous prime is 634483. The next prime is 634493. The reversal of 634487 is 784436.

It is a happy number.

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 634487 - 2² = 634483 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (634483) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 45314 + ... + 45327.

It is an arithmetic number, because the mean of its divisors is an integer number (181284).

2⁶³⁴⁴⁸⁷ is an apocalyptic number.

634487 is a deficient number, since it is larger than the sum of its proper divisors (90649).

634487 is an equidigital number, since it uses as much as digits as its factorization.

634487 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 90648.

The product of its digits is 16128, while the sum is 32.

The square root of 634487 is about 796.5469226606. The cubic root of 634487 is about 85.9292278759.

The spelling of 634487 in words is "six hundred thirty-four thousand, four hundred eighty-seven".