6731139 has 8 divisors (see below), whose sum is σ = 8990032. Its totient is φ = 4479840.

The previous prime is 6731117. The next prime is 6731171. The reversal of 6731139 is 9311376.

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

It is not a de Polignac number, because 6731139 - 2⁵ = 6731107 is a prime.

It is an Ulam number.

It is a Duffinian number.

6731139 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (6731239) 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, 669 + ... + 3729.

It is an arithmetic number, because the mean of its divisors is an integer number (1123754).

Almost surely, 2^6731139 is an apocalyptic number.

6731139 is a deficient number, since it is larger than the sum of its proper divisors (2258893).

6731139 is a wasteful number, since it uses less digits than its factorization.

6731139 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3797.

The product of its digits is 3402, while the sum is 30.

The square root of 6731139 is about 2594.4438710444. The cubic root of 6731139 is about 188.8119683085.

It can be divided in two parts, 6 and 731139, that multiplied together give a palindrome (4386834).

The spelling of 6731139 in words is "six million, seven hundred thirty-one thousand, one hundred thirty-nine".