637942 has 16 divisors (see below), whose sum is σ = 1049760. Its totient is φ = 289408.

The previous prime is 637939. The next prime is 638023. The reversal of 637942 is 249736.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 663 + ... + 1309.

It is an arithmetic number, because the mean of its divisors is an integer number (65610).

2⁶³⁷⁹⁴² is an apocalyptic number.

637942 is a deficient number, since it is larger than the sum of its proper divisors (411818).

637942 is a wasteful number, since it uses less digits than its factorization.

637942 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 695.

The product of its digits is 9072, while the sum is 31.

The square root of 637942 is about 798.7127143097. The cubic root of 637942 is about 86.0849170261.

The spelling of 637942 in words is "six hundred thirty-seven thousand, nine hundred forty-two".