939871 has 2 divisors, whose sum is σ = 939872. Its totient is φ = 939870.

The previous prime is 939853. The next prime is 939881. The reversal of 939871 is 178939.

It is a strong prime.

It is an emirp because it is prime and its reverse (178939) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 939871 - 2⁵ = 939839 is a prime.

939871 is a lucky number.

It is a self number, because there is not a number n which added to its sum of digits gives 939871.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (939881) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 469935 + 469936.

It is an arithmetic number, because the mean of its divisors is an integer number (469936).

2⁹³⁹⁸⁷¹ is an apocalyptic number.

939871 is a deficient number, since it is larger than the sum of its proper divisors (1).

939871 is an equidigital number, since it uses as much as digits as its factorization.

939871 is an evil number, because the sum of its binary digits is even.

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

The square root of 939871 is about 969.4694425303. The cubic root of 939871 is about 97.9541295812.

The spelling of 939871 in words is "nine hundred thirty-nine thousand, eight hundred seventy-one".