6943881321 has 12 divisors (see below), whose sum is σ = 10801593348. Its totient is φ = 4273157664.

The previous prime is 6943881317. The next prime is 6943881349. The reversal of 6943881321 is 1231883496.

It can be written as a sum of positive squares in 2 ways, for example, as 1506293721 + 5437587600 = 38811^2 + 73740^2 .

It is not a de Polignac number, because 6943881321 - 2² = 6943881317 is a prime.

It is a hoax number, since the sum of its digits (45) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (6943881311) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 29674590 + ... + 29674823.

It is an arithmetic number, because the mean of its divisors is an integer number (900132779).

Almost surely, 2^6943881321 is an apocalyptic number.

It is an amenable number.

6943881321 is a deficient number, since it is larger than the sum of its proper divisors (3857712027).

6943881321 is a wasteful number, since it uses less digits than its factorization.

6943881321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 59349432 (or 59349429 counting only the distinct ones).

The product of its digits is 248832, while the sum is 45.

The square root of 6943881321 is about 83329.9545241686. The cubic root of 6943881321 is about 1907.8055002941.

The spelling of 6943881321 in words is "six billion, nine hundred forty-three million, eight hundred eighty-one thousand, three hundred twenty-one".