872739 has 18 divisors (see below), whose sum is σ = 1467180. Its totient is φ = 498456.

The previous prime is 872737. The next prime is 872747. The reversal of 872739 is 937278.

It is not a de Polignac number, because 872739 - 2¹ = 872737 is a prime.

It is a hoax number, since the sum of its digits (36) coincides with the sum of the digits of its distinct prime factors.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 872739.

It is not an unprimeable number, because it can be changed into a prime (872731) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 549 + ... + 1430.

It is an arithmetic number, because the mean of its divisors is an integer number (81510).

2⁸⁷²⁷³⁹ is an apocalyptic number.

872739 is a deficient number, since it is larger than the sum of its proper divisors (594441).

872739 is a wasteful number, since it uses less digits than its factorization.

872739 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1999 (or 1989 counting only the distinct ones).

The product of its digits is 21168, while the sum is 36.

The square root of 872739 is about 934.2050096205. The cubic root of 872739 is about 95.5641045073.

The spelling of 872739 in words is "eight hundred seventy-two thousand, seven hundred thirty-nine".