639112 has 8 divisors (see below), whose sum is σ = 1198350. Its totient is φ = 319552.

The previous prime is 639091. The next prime is 639137. The reversal of 639112 is 211936.

It can be written as a sum of positive squares in only one way, i.e., 617796 + 21316 = 786^2 + 146^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is an unprimeable number.

639112 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39937 + ... + 39952.

2⁶³⁹¹¹² is an apocalyptic number.

It is an amenable number.

639112 is a deficient number, since it is larger than the sum of its proper divisors (559238).

639112 is a wasteful number, since it uses less digits than its factorization.

639112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 79895 (or 79891 counting only the distinct ones).

The product of its digits is 324, while the sum is 22.

The square root of 639112 is about 799.4448073507. Note that the first 3 decimals coincide. The cubic root of 639112 is about 86.1375121114.

It can be divided in two parts, 63 and 9112, that multiplied together give a triangular number (574056 = T₁₀₇₁).

The spelling of 639112 in words is "six hundred thirty-nine thousand, one hundred twelve".