939391 has 2 divisors, whose sum is σ = 939392. Its totient is φ = 939390.

The previous prime is 939377. The next prime is 939413. The reversal of 939391 is 193939.

It is a happy number.

It is a weak prime.

It is an emirp because it is prime and its reverse (193939) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 939391 - 2⁵ = 939359 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (939361) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 469695 + 469696.

It is an arithmetic number, because the mean of its divisors is an integer number (469696).

2⁹³⁹³⁹¹ is an apocalyptic number.

939391 is a deficient number, since it is larger than the sum of its proper divisors (1).

939391 is an equidigital number, since it uses as much as digits as its factorization.

939391 is an evil number, because the sum of its binary digits is even.

The product of its digits is 6561, while the sum is 34.

The square root of 939391 is about 969.2218528283. The cubic root of 939391 is about 97.9374514099.

The spelling of 939391 in words is "nine hundred thirty-nine thousand, three hundred ninety-one".