2981689 has 8 divisors (see below), whose sum is σ = 3164000. Its totient is φ = 2801952.

The previous prime is 2981677. The next prime is 2981707. The reversal of 2981689 is 9861892.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 2981689 - 2¹³ = 2973497 is a prime.

It is a Duffinian number.

It is a plaindrome in base 14.

It is a nialpdrome in base 12.

It is not an unprimeable number, because it can be changed into a prime (2981669) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2077 + ... + 3205.

It is an arithmetic number, because the mean of its divisors is an integer number (395500).

2^2981689 is an apocalyptic number.

It is an amenable number.

2981689 is a deficient number, since it is larger than the sum of its proper divisors (182311).

2981689 is a wasteful number, since it uses less digits than its factorization.

2981689 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1287.

The product of its digits is 62208, while the sum is 43.

The square root of 2981689 is about 1726.7567865800. The cubic root of 2981689 is about 143.9309243033.

It can be divided in two parts, 29 and 81689, that added together give a palindrome (81718).

The spelling of 2981689 in words is "two million, nine hundred eighty-one thousand, six hundred eighty-nine".