7939391 has 8 divisors (see below), whose sum is σ = 8602704. Its totient is φ = 7297920.

The previous prime is 7939387. The next prime is 7939403. The reversal of 7939391 is 1939397.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 7939391 - 2² = 7939387 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 (7939361) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4700 + ... + 6161.

It is an arithmetic number, because the mean of its divisors is an integer number (1075338).

Almost surely, 2^7939391 is an apocalyptic number.

7939391 is a deficient number, since it is larger than the sum of its proper divisors (663313).

7939391 is a wasteful number, since it uses less digits than its factorization.

7939391 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10921.

The product of its digits is 45927, while the sum is 41.

The square root of 7939391 is about 2817.6924956425. The cubic root of 7939391 is about 199.4936441004.

The spelling of 7939391 in words is "seven million, nine hundred thirty-nine thousand, three hundred ninety-one".