634646 has 4 divisors (see below), whose sum is σ = 951972. Its totient is φ = 317322.

The previous prime is 634643. The next prime is 634649. The reversal of 634646 is 646436.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (634643) and next prime (634649).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (634643) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 158660 + ... + 158663.

It is an arithmetic number, because the mean of its divisors is an integer number (237993).

2⁶³⁴⁶⁴⁶ is an apocalyptic number.

634646 is a deficient number, since it is larger than the sum of its proper divisors (317326).

634646 is a wasteful number, since it uses less digits than its factorization.

634646 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 317325.

The product of its digits is 10368, while the sum is 29.

The square root of 634646 is about 796.6467222050. The cubic root of 634646 is about 85.9364051210.

The spelling of 634646 in words is "six hundred thirty-four thousand, six hundred forty-six".