2131789437 has 6 divisors (see below), whose sum is σ = 3079251422. Its totient is φ = 1421192952.

The previous prime is 2131789433. The next prime is 2131789501. The reversal of 2131789437 is 7349871312.

2131789437 is a `hidden beast` number, since 2 + 131 + 7 + 89 + 437 = 666.

It can be written as a sum of positive squares in only one way, i.e., 1769800761 + 361988676 = 42069^2 + 19026^2 .

It is not a de Polignac number, because 2131789437 - 2² = 2131789433 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2131789392 and 2131789401.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2131789433) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 118432738 + ... + 118432755.

Almost surely, 2^2131789437 is an apocalyptic number.

It is an amenable number.

2131789437 is a deficient number, since it is larger than the sum of its proper divisors (947461985).

2131789437 is a wasteful number, since it uses less digits than its factorization.

2131789437 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 236865499 (or 236865496 counting only the distinct ones).

The product of its digits is 254016, while the sum is 45.

The square root of 2131789437 is about 46171.3053421711. The cubic root of 2131789437 is about 1287.0085596300.

The spelling of 2131789437 in words is "two billion, one hundred thirty-one million, seven hundred eighty-nine thousand, four hundred thirty-seven".