6976868138 has 4 divisors (see below), whose sum is σ = 10465302210. Its totient is φ = 3488434068.

The previous prime is 6976868123. The next prime is 6976868159. The reversal of 6976868138 is 8318686796.

It is a happy number.

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

It can be written as a sum of positive squares in only one way, i.e., 4822330249 + 2154537889 = 69443^2 + 46417^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1744217033 + ... + 1744217036.

Almost surely, 2^6976868138 is an apocalyptic number.

6976868138 is a deficient number, since it is larger than the sum of its proper divisors (3488434072).

6976868138 is a wasteful number, since it uses less digits than its factorization.

6976868138 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3488434071.

The product of its digits is 20901888, while the sum is 62.

The square root of 6976868138 is about 83527.6489433289. The cubic root of 6976868138 is about 1910.8217307924.

The spelling of 6976868138 in words is "six billion, nine hundred seventy-six million, eight hundred sixty-eight thousand, one hundred thirty-eight".