6781322971 has 4 divisors (see below), whose sum is σ = 6804467712. Its totient is φ = 6758178232.

The previous prime is 6781322941. The next prime is 6781322981. The reversal of 6781322971 is 1792231876.

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

It is a cyclic number.

It is not a de Polignac number, because 6781322971 - 2¹⁵ = 6781290203 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6781322941) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11571931 + ... + 11572516.

It is an arithmetic number, because the mean of its divisors is an integer number (1701116928).

Almost surely, 2^6781322971 is an apocalyptic number.

6781322971 is a deficient number, since it is larger than the sum of its proper divisors (23144741).

6781322971 is a wasteful number, since it uses less digits than its factorization.

6781322971 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23144740.

The product of its digits is 254016, while the sum is 46.

The square root of 6781322971 is about 82348.7885217506. The cubic root of 6781322971 is about 1892.8003587849.

The spelling of 6781322971 in words is "six billion, seven hundred eighty-one million, three hundred twenty-two thousand, nine hundred seventy-one".