634637 has 4 divisors (see below), whose sum is σ = 649440. Its totient is φ = 619836.

The previous prime is 634609. The next prime is 634643. The reversal of 634637 is 736436.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 634637 - 2⁶ = 634573 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 (634687) 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 in 3 ways as a sum of consecutive naturals, for example, 7337 + ... + 7422.

It is an arithmetic number, because the mean of its divisors is an integer number (162360).

2⁶³⁴⁶³⁷ is an apocalyptic number.

It is an amenable number.

634637 is a deficient number, since it is larger than the sum of its proper divisors (14803).

634637 is a wasteful number, since it uses less digits than its factorization.

634637 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14802.

The product of its digits is 9072, while the sum is 29.

The square root of 634637 is about 796.6410735080. The cubic root of 634637 is about 85.9359988939.

It can be divided in two parts, 6 and 34637, that added together give a palindrome (34643).

The spelling of 634637 in words is "six hundred thirty-four thousand, six hundred thirty-seven".