6839258749 has 4 divisors (see below), whose sum is σ = 7006069980. Its totient is φ = 6672447520.

The previous prime is 6839258743. The next prime is 6839258759. The reversal of 6839258749 is 9478529386.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 1964705625 + 4874553124 = 44325^2 + 69818^2 .

It is a cyclic number.

It is not a de Polignac number, because 6839258749 - 2⁵ = 6839258717 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 (6839258743) 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, 83405554 + ... + 83405635.

It is an arithmetic number, because the mean of its divisors is an integer number (1751517495).

Almost surely, 2^6839258749 is an apocalyptic number.

It is an amenable number.

6839258749 is a deficient number, since it is larger than the sum of its proper divisors (166811231).

6839258749 is a wasteful number, since it uses less digits than its factorization.

6839258749 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 166811230.

The product of its digits is 26127360, while the sum is 61.

The square root of 6839258749 is about 82699.8110578253. The cubic root of 6839258749 is about 1898.1754182097.

The spelling of 6839258749 in words is "six billion, eight hundred thirty-nine million, two hundred fifty-eight thousand, seven hundred forty-nine".