639127 has 8 divisors (see below), whose sum is σ = 673920. Its totient is φ = 605280.

The previous prime is 639091. The next prime is 639137. The reversal of 639127 is 721936.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 639127 - 2⁷ = 638999 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 639095 and 639104.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (639137) 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, 1449 + ... + 1837.

It is an arithmetic number, because the mean of its divisors is an integer number (84240).

2⁶³⁹¹²⁷ is an apocalyptic number.

639127 is a deficient number, since it is larger than the sum of its proper divisors (34793).

639127 is a wasteful number, since it uses less digits than its factorization.

639127 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 473.

The product of its digits is 2268, while the sum is 28.

The square root of 639127 is about 799.4541888063. The cubic root of 639127 is about 86.1381859905.

The spelling of 639127 in words is "six hundred thirty-nine thousand, one hundred twenty-seven".