939971 has 2 divisors, whose sum is σ = 939972. Its totient is φ = 939970.

The previous prime is 939931. The next prime is 939973. The reversal of 939971 is 179939.

It is a happy number.

It is a strong prime.

It is an emirp because it is prime and its reverse (179939) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 939971 - 2¹⁰ = 938947 is a prime.

Together with 939973, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (939973) by changing a digit.

It is a good prime.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 469985 + 469986.

It is an arithmetic number, because the mean of its divisors is an integer number (469986).

2⁹³⁹⁹⁷¹ is an apocalyptic number.

939971 is a deficient number, since it is larger than the sum of its proper divisors (1).

939971 is an equidigital number, since it uses as much as digits as its factorization.

939971 is an evil number, because the sum of its binary digits is even.

The product of its digits is 15309, while the sum is 38.

The square root of 939971 is about 969.5210157598. The cubic root of 939971 is about 97.9576034854.

The spelling of 939971 in words is "nine hundred thirty-nine thousand, nine hundred seventy-one".