6981670321 has 4 divisors (see below), whose sum is σ = 7049453632. Its totient is φ = 6913887012.

The previous prime is 6981670307. The next prime is 6981670331. The reversal of 6981670321 is 1230761896.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-6981670321 is a prime.

It is a super-2 number, since 2×6981670321² = 97487440942264486082, which contains 22 as substring.

It is an alternating number because its digits alternate between even and odd.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6981670331) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 33891501 + ... + 33891706.

It is an arithmetic number, because the mean of its divisors is an integer number (1762363408).

Almost surely, 2^6981670321 is an apocalyptic number.

It is an amenable number.

6981670321 is a deficient number, since it is larger than the sum of its proper divisors (67783311).

6981670321 is a wasteful number, since it uses less digits than its factorization.

6981670321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 67783310.

The product of its (nonzero) digits is 108864, while the sum is 43.

The square root of 6981670321 is about 83556.3900668285. The cubic root of 6981670321 is about 1911.2600368702.

The spelling of 6981670321 in words is "six billion, nine hundred eighty-one million, six hundred seventy thousand, three hundred twenty-one".