873639 has 32 divisors (see below), whose sum is σ = 1478400. Its totient is φ = 505440.

The previous prime is 873619. The next prime is 873641. The reversal of 873639 is 936378.

It is not a de Polignac number, because 873639 - 2¹² = 869543 is a prime.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 873639.

It is not an unprimeable number, because it can be changed into a prime (873619) 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 31 ways as a sum of consecutive naturals, for example, 6604 + ... + 6734.

It is an arithmetic number, because the mean of its divisors is an integer number (46200).

2⁸⁷³⁶³⁹ is an apocalyptic number.

873639 is a deficient number, since it is larger than the sum of its proper divisors (604761).

873639 is a wasteful number, since it uses less digits than its factorization.

873639 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 172 (or 166 counting only the distinct ones).

The product of its digits is 27216, while the sum is 36.

The square root of 873639 is about 934.6865784850. The cubic root of 873639 is about 95.5969429413.

The spelling of 873639 in words is "eight hundred seventy-three thousand, six hundred thirty-nine".