2131789 has 4 divisors (see below), whose sum is σ = 2325600. Its totient is φ = 1937980.

The previous prime is 2131771. The next prime is 2131793. The reversal of 2131789 is 9871312.

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 not a de Polignac number, because 2131789 - 2¹¹ = 2129741 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 2131789.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2131799) 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, 96889 + ... + 96910.

It is an arithmetic number, because the mean of its divisors is an integer number (581400).

2^2131789 is an apocalyptic number.

It is an amenable number.

2131789 is a deficient number, since it is larger than the sum of its proper divisors (193811).

2131789 is a wasteful number, since it uses less digits than its factorization.

2131789 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 193810.

The product of its digits is 3024, while the sum is 31.

The square root of 2131789 is about 1460.0647245927. The cubic root of 2131789 is about 128.7008471688.

It can be divided in two parts, 213 and 1789, that added together give a palindrome (2002).

The spelling of 2131789 in words is "two million, one hundred thirty-one thousand, seven hundred eighty-nine".