637996 has 6 divisors (see below), whose sum is σ = 1116500. Its totient is φ = 318996.

The previous prime is 637939. The next prime is 638023. The reversal of 637996 is 699736.

637996 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a d-powerful number, because it can be written as 6⁷ + 3⁷ + 9² + 7⁵ + 9⁵ + 6⁷ .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 79746 + ... + 79753.

2⁶³⁷⁹⁹⁶ is an apocalyptic number.

It is an amenable number.

637996 is a deficient number, since it is larger than the sum of its proper divisors (478504).

637996 is a wasteful number, since it uses less digits than its factorization.

637996 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 159503 (or 159501 counting only the distinct ones).

The product of its digits is 61236, while the sum is 40.

The square root of 637996 is about 798.7465179893. The cubic root of 637996 is about 86.0873459064.

The spelling of 637996 in words is "six hundred thirty-seven thousand, nine hundred ninety-six".