6839957 has 4 divisors (see below), whose sum is σ = 6985536. Its totient is φ = 6694380.

The previous prime is 6839939. The next prime is 6839971. The reversal of 6839957 is 7599386.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 6839957 - 2⁶ = 6839893 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (47), and also a Moran number because the ratio is a prime number: 145531 = 6839957 / (6 + 8 + 3 + 9 + 9 + 5 + 7).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6839557) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 72719 + ... + 72812.

It is an arithmetic number, because the mean of its divisors is an integer number (1746384).

Almost surely, 2^6839957 is an apocalyptic number.

It is an amenable number.

6839957 is a deficient number, since it is larger than the sum of its proper divisors (145579).

6839957 is a wasteful number, since it uses less digits than its factorization.

6839957 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 145578.

The product of its digits is 408240, while the sum is 47.

The square root of 6839957 is about 2615.3311453810. The cubic root of 6839957 is about 189.8240013796.

It can be divided in two parts, 683995 and 7, that multiplied together give a triangular number (4787965 = T₃₀₉₄).

The spelling of 6839957 in words is "six million, eight hundred thirty-nine thousand, nine hundred fifty-seven".