1836689 has 2 divisors, whose sum is σ = 1836690. Its totient is φ = 1836688.

The previous prime is 1836647. The next prime is 1836691. The reversal of 1836689 is 9866381.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1690000 + 146689 = 1300^2 + 383^2 .

It is a cyclic number.

It is not a de Polignac number, because 1836689 - 2⁸ = 1836433 is a prime.

Together with 1836691, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (1835689) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 918344 + 918345.

It is an arithmetic number, because the mean of its divisors is an integer number (918345).

2^1836689 is an apocalyptic number.

It is an amenable number.

1836689 is a deficient number, since it is larger than the sum of its proper divisors (1).

1836689 is an equidigital number, since it uses as much as digits as its factorization.

1836689 is an evil number, because the sum of its binary digits is even.

The product of its digits is 62208, while the sum is 41.

The square root of 1836689 is about 1355.2449963014. The cubic root of 1836689 is about 122.4649684641.

The spelling of 1836689 in words is "one million, eight hundred thirty-six thousand, six hundred eighty-nine".