2943684681 has 16 divisors (see below), whose sum is σ = 4488812544. Its totient is φ = 1680906384.

The previous prime is 2943684661. The next prime is 2943684707. The reversal of 2943684681 is 1864863492.

It is not a de Polignac number, because 2943684681 - 2¹¹ = 2943682633 is a prime.

It is a super-2 number, since 2×2943684681² = 17330559002308143522, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (2943684641) 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, 19371 + ... + 79136.

It is an arithmetic number, because the mean of its divisors is an integer number (280550784).

Almost surely, 2^2943684681 is an apocalyptic number.

2943684681 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

2943684681 is a deficient number, since it is larger than the sum of its proper divisors (1545127863).

2943684681 is a wasteful number, since it uses less digits than its factorization.

2943684681 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 99940.

The product of its digits is 1990656, while the sum is 51.

The square root of 2943684681 is about 54255.7340840579. The cubic root of 2943684681 is about 1433.1679779621.

The spelling of 2943684681 in words is "two billion, nine hundred forty-three million, six hundred eighty-four thousand, six hundred eighty-one".