2939681 has 4 divisors (see below), whose sum is σ = 2955264. Its totient is φ = 2924100.

The previous prime is 2939663. The next prime is 2939683. The reversal of 2939681 is 1869392.

2939681 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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-2939681 is a prime.

It is a super-2 number, since 2×2939681² = 17283448763522, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2939683) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7505 + ... + 7886.

It is an arithmetic number, because the mean of its divisors is an integer number (738816).

2^2939681 is an apocalyptic number.

It is an amenable number.

2939681 is a deficient number, since it is larger than the sum of its proper divisors (15583).

2939681 is a wasteful number, since it uses less digits than its factorization.

2939681 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15582.

The product of its digits is 23328, while the sum is 38.

The square root of 2939681 is about 1714.5497951357. The cubic root of 2939681 is about 143.2517936560.

The spelling of 2939681 in words is "two million, nine hundred thirty-nine thousand, six hundred eighty-one".