871399 has 4 divisors (see below), whose sum is σ = 881280. Its totient is φ = 861520.

The previous prime is 871393. The next prime is 871439. The reversal of 871399 is 993178.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 871399 - 2⁷ = 871271 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 (871393) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4807 + ... + 4984.

It is an arithmetic number, because the mean of its divisors is an integer number (220320).

2⁸⁷¹³⁹⁹ is an apocalyptic number.

871399 is a gapful number since it is divisible by the number (89) formed by its first and last digit.

871399 is a deficient number, since it is larger than the sum of its proper divisors (9881).

871399 is an equidigital number, since it uses as much as digits as its factorization.

871399 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9880.

The product of its digits is 13608, while the sum is 37.

The square root of 871399 is about 933.4875467836. The cubic root of 871399 is about 95.5151698716.

The spelling of 871399 in words is "eight hundred seventy-one thousand, three hundred ninety-nine".