2938681 has 4 divisors (see below), whose sum is σ = 2942500. Its totient is φ = 2934864.

The previous prime is 2938679. The next prime is 2938697. The reversal of 2938681 is 1868392.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 810000 + 2128681 = 900^2 + 1459^2 .

It is a cyclic number.

It is not a de Polignac number, because 2938681 - 2¹ = 2938679 is a prime.

It is a super-2 number, since 2×2938681² = 17271692039522, which contains 22 as substring.

It is a Duffinian number.

It is a nialpdrome in base 12.

It is a self number, because there is not a number n which added to its sum of digits gives 2938681.

It is not an unprimeable number, because it can be changed into a prime (2938601) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 306 + ... + 2443.

It is an arithmetic number, because the mean of its divisors is an integer number (735625).

2^2938681 is an apocalyptic number.

It is an amenable number.

2938681 is a deficient number, since it is larger than the sum of its proper divisors (3819).

2938681 is a wasteful number, since it uses less digits than its factorization.

2938681 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3818.

The product of its digits is 20736, while the sum is 37.

The square root of 2938681 is about 1714.2581485879. The cubic root of 2938681 is about 143.2355483514.

The spelling of 2938681 in words is "two million, nine hundred thirty-eight thousand, six hundred eighty-one".