938639 has 8 divisors (see below), whose sum is σ = 1022112. Its totient is φ = 856800.

The previous prime is 938617. The next prime is 938659. The reversal of 938639 is 936839.

It is a happy number.

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 938639 - 2¹² = 934543 is a prime.

It is a super-3 number, since 3×938639³ = 2480944446672633357, which contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (938659) 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 7 ways as a sum of consecutive naturals, for example, 989 + ... + 1689.

It is an arithmetic number, because the mean of its divisors is an integer number (127764).

2⁹³⁸⁶³⁹ is an apocalyptic number.

938639 is a deficient number, since it is larger than the sum of its proper divisors (83473).

938639 is a wasteful number, since it uses less digits than its factorization.

938639 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 817.

The product of its digits is 34992, while the sum is 38.

The square root of 938639 is about 968.8338350822. The cubic root of 938639 is about 97.9113108483.

The spelling of 938639 in words is "nine hundred thirty-eight thousand, six hundred thirty-nine".