2789971 has 4 divisors (see below), whose sum is σ = 2806272. Its totient is φ = 2773672.

The previous prime is 2789951. The next prime is 2789993. The reversal of 2789971 is 1799872.

It is a happy number.

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 2789971 - 2⁵ = 2789939 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2789951) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7891 + ... + 8236.

It is an arithmetic number, because the mean of its divisors is an integer number (701568).

2^2789971 is an apocalyptic number.

2789971 is a deficient number, since it is larger than the sum of its proper divisors (16301).

2789971 is a wasteful number, since it uses less digits than its factorization.

2789971 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16300.

The product of its digits is 63504, while the sum is 43.

The square root of 2789971 is about 1670.3206279035. The cubic root of 2789971 is about 140.7774939008. Note that the first 3 decimals are identical.

Subtracting from 2789971 its reverse (1799872), we obtain a palindrome (990099).

It can be divided in two parts, 27 and 89971, that added together give a palindrome (89998).

The spelling of 2789971 in words is "two million, seven hundred eighty-nine thousand, nine hundred seventy-one".