871623 has 6 divisors (see below), whose sum is σ = 1259024. Its totient is φ = 581076.

The previous prime is 871621. The next prime is 871639. The reversal of 871623 is 326178.

It is not a de Polignac number, because 871623 - 2¹ = 871621 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (871621) 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 5 ways as a sum of consecutive naturals, for example, 48415 + ... + 48432.

2⁸⁷¹⁶²³ is an apocalyptic number.

871623 is a deficient number, since it is larger than the sum of its proper divisors (387401).

871623 is a wasteful number, since it uses less digits than its factorization.

871623 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 96853 (or 96850 counting only the distinct ones).

The product of its digits is 2016, while the sum is 27.

The square root of 871623 is about 933.6075192499. The cubic root of 871623 is about 95.5233534802.

It can be divided in two parts, 8 and 71623, that added together give a triangular number (71631 = T₃₇₈).

The spelling of 871623 in words is "eight hundred seventy-one thousand, six hundred twenty-three".