6982135921 has 16 divisors (see below), whose sum is σ = 7534660608. Its totient is φ = 6451156800.

The previous prime is 6982135907. The next prime is 6982135931. The reversal of 6982135921 is 1295312896.

It is a cyclic number.

It is not a de Polignac number, because 6982135921 - 2¹⁵ = 6982103153 is a prime.

It is not an unprimeable number, because it can be changed into a prime (6982135931) 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, 388351 + ... + 405931.

It is an arithmetic number, because the mean of its divisors is an integer number (470916288).

Almost surely, 2^6982135921 is an apocalyptic number.

It is an amenable number.

6982135921 is a deficient number, since it is larger than the sum of its proper divisors (552524687).

6982135921 is a wasteful number, since it uses less digits than its factorization.

6982135921 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18192.

The product of its digits is 233280, while the sum is 46.

The square root of 6982135921 is about 83559.1761627650. The cubic root of 6982135921 is about 1911.3025225435.

The spelling of 6982135921 in words is "six billion, nine hundred eighty-two million, one hundred thirty-five thousand, nine hundred twenty-one".