6929840042 has 8 divisors (see below), whose sum is σ = 10398083076. Its totient is φ = 3463812352.

The previous prime is 6929839979. The next prime is 6929840063. The reversal of 6929840042 is 2400489296.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 4479491041 + 2450349001 = 66929^2 + 49501^2 .

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

It is a junction number, because it is equal to n+sod(n) for n = 6929839975 and 6929840002.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 545993 + ... + 558540.

Almost surely, 2^6929840042 is an apocalyptic number.

6929840042 is a deficient number, since it is larger than the sum of its proper divisors (3468243034).

6929840042 is a wasteful number, since it uses less digits than its factorization.

6929840042 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1107672.

The product of its (nonzero) digits is 248832, while the sum is 44.

The square root of 6929840042 is about 83245.6607998279. The cubic root of 6929840042 is about 1906.5187028736.

The spelling of 6929840042 in words is "six billion, nine hundred twenty-nine million, eight hundred forty thousand, forty-two".