1836985 has 4 divisors (see below), whose sum is σ = 2204388. Its totient is φ = 1469584.

The previous prime is 1836979. The next prime is 1837007. The reversal of 1836985 is 5896381.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 5896381 = 1783 ⋅3307.

It can be written as a sum of positive squares in 2 ways, for example, as 484416 + 1352569 = 696^2 + 1163^2 .

It is a cyclic number.

It is not a de Polignac number, because 1836985 - 2⁹ = 1836473 is a prime.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is an alternating number because its digits alternate between odd and even.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 183694 + ... + 183703.

It is an arithmetic number, because the mean of its divisors is an integer number (551097).

2^1836985 is an apocalyptic number.

It is an amenable number.

1836985 is a deficient number, since it is larger than the sum of its proper divisors (367403).

1836985 is an equidigital number, since it uses as much as digits as its factorization.

1836985 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 367402.

The product of its digits is 51840, while the sum is 40.

The square root of 1836985 is about 1355.3541972488. The cubic root of 1836985 is about 122.4715469111.

The spelling of 1836985 in words is "one million, eight hundred thirty-six thousand, nine hundred eighty-five".