637634 has 4 divisors (see below), whose sum is σ = 956454. Its totient is φ = 318816.

The previous prime is 637627. The next prime is 637657. The reversal of 637634 is 436736.

637634 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It can be written as a sum of positive squares in only one way, i.e., 390625 + 247009 = 625^2 + 497^2 .

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 637597 and 637606.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 159407 + ... + 159410.

2⁶³⁷⁶³⁴ is an apocalyptic number.

637634 is a deficient number, since it is larger than the sum of its proper divisors (318820).

637634 is a wasteful number, since it uses less digits than its factorization.

637634 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 318819.

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

The square root of 637634 is about 798.5198807794. The cubic root of 637634 is about 86.0710607912.

The spelling of 637634 in words is "six hundred thirty-seven thousand, six hundred thirty-four".