6997839 has 8 divisors (see below), whose sum is σ = 9558192. Its totient is φ = 4551360.

The previous prime is 6997817. The next prime is 6997841. The reversal of 6997839 is 9387996.

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

It is not a de Polignac number, because 6997839 - 2⁵ = 6997807 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 6997791 and 6997800.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6997849) 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, 28324 + ... + 28569.

It is an arithmetic number, because the mean of its divisors is an integer number (1194774).

Almost surely, 2^6997839 is an apocalyptic number.

6997839 is a deficient number, since it is larger than the sum of its proper divisors (2560353).

6997839 is a wasteful number, since it uses less digits than its factorization.

6997839 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 56937.

The product of its digits is 734832, while the sum is 51.

The square root of 6997839 is about 2645.3428889276. The cubic root of 6997839 is about 191.2734312784.

The spelling of 6997839 in words is "six million, nine hundred ninety-seven thousand, eight hundred thirty-nine".