637983 has 8 divisors (see below), whose sum is σ = 945200. Its totient is φ = 425304.

The previous prime is 637939. The next prime is 638023. The reversal of 637983 is 389736.

It is not a de Polignac number, because 637983 - 2⁸ = 637727 is a prime.

It is a Duffinian number.

637983 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (637933) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11788 + ... + 11841.

It is an arithmetic number, because the mean of its divisors is an integer number (118150).

2⁶³⁷⁹⁸³ is an apocalyptic number.

637983 is a deficient number, since it is larger than the sum of its proper divisors (307217).

637983 is a wasteful number, since it uses less digits than its factorization.

637983 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23638 (or 23632 counting only the distinct ones).

The product of its digits is 27216, while the sum is 36.

The square root of 637983 is about 798.7383801972. The cubic root of 637983 is about 86.0867611885.

The spelling of 637983 in words is "six hundred thirty-seven thousand, nine hundred eighty-three".