6947138549 has 16 divisors (see below), whose sum is σ = 8008795200. Its totient is φ = 5972247936.

The previous prime is 6947138531. The next prime is 6947138551. The reversal of 6947138549 is 9458317496.

It is a cyclic number.

It is not a de Polignac number, because 6947138549 - 2¹⁶ = 6947073013 is a prime.

It is a Smith number, since the sum of its digits (56) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 6947138494 and 6947138503.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6947134549) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 223784 + ... + 252929.

It is an arithmetic number, because the mean of its divisors is an integer number (500549700).

Almost surely, 2^6947138549 is an apocalyptic number.

It is an amenable number.

6947138549 is a deficient number, since it is larger than the sum of its proper divisors (1061656651).

6947138549 is a wasteful number, since it uses less digits than its factorization.

6947138549 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 476804.

The product of its digits is 6531840, while the sum is 56.

The square root of 6947138549 is about 83349.4963931996. The cubic root of 6947138549 is about 1908.1037574127.

The spelling of 6947138549 in words is "six billion, nine hundred forty-seven million, one hundred thirty-eight thousand, five hundred forty-nine".