6981939364 has 27 divisors (see below), whose sum is σ = 12535974241. Its totient is φ = 3402481760.

The previous prime is 6981939361. The next prime is 6981939379. The reversal of 6981939364 is 4639391896.

The square root of 6981939364 is 83558.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 336428964 + 6645510400 = 18342^2 + 81520^2 .

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 6981939299 and 6981939308.

It is not an unprimeable number, because it can be changed into a prime (6981939361) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 6851247 + ... + 6852265.

Almost surely, 2^6981939364 is an apocalyptic number.

6981939364 is the 83558-th square number.

It is an amenable number.

6981939364 is a deficient number, since it is larger than the sum of its proper divisors (5554034877).

6981939364 is an equidigital number, since it uses as much as digits as its factorization.

6981939364 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2124 (or 1062 counting only the distinct ones).

The product of its digits is 7558272, while the sum is 58.

The cubic root of 6981939364 is about 1911.2845870856.

The spelling of 6981939364 in words is "six billion, nine hundred eighty-one million, nine hundred thirty-nine thousand, three hundred sixty-four".