639327 has 16 divisors (see below), whose sum is σ = 932960. Its totient is φ = 389376.

The previous prime is 639311. The next prime is 639329. The reversal of 639327 is 723936.

It is a happy number.

It is not a de Polignac number, because 639327 - 2⁴ = 639311 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 639294 and 639303.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (639329) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6543 + ... + 6639.

It is an arithmetic number, because the mean of its divisors is an integer number (58310).

2⁶³⁹³²⁷ is an apocalyptic number.

639327 is a deficient number, since it is larger than the sum of its proper divisors (293633).

639327 is an equidigital number, since it uses as much as digits as its factorization.

639327 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 139 (or 113 counting only the distinct ones).

The product of its digits is 6804, while the sum is 30.

The square root of 639327 is about 799.5792643635. The cubic root of 639327 is about 86.1471700372.

The spelling of 639327 in words is "six hundred thirty-nine thousand, three hundred twenty-seven".