11836985 has 4 divisors (see below), whose sum is σ = 14204388. Its totient is φ = 9469584.

The previous prime is 11836969. The next prime is 11836991. The reversal of 11836985 is 58963811.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 58963811 = 263 ⋅224197.

It can be written as a sum of positive squares in 2 ways, for example, as 6620329 + 5216656 = 2573^2 + 2284^2 .

It is a cyclic number.

It is not a de Polignac number, because 11836985 - 2⁴ = 11836969 is a prime.

It is a super-2 number, since 2×11836985² = 280228427780450, which contains 22 as substring.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1183694 + ... + 1183703.

It is an arithmetic number, because the mean of its divisors is an integer number (3551097).

Almost surely, 2^11836985 is an apocalyptic number.

It is an amenable number.

11836985 is a deficient number, since it is larger than the sum of its proper divisors (2367403).

11836985 is an equidigital number, since it uses as much as digits as its factorization.

11836985 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2367402.

The product of its digits is 51840, while the sum is 41.

The square root of 11836985 is about 3440.4919706344. The cubic root of 11836985 is about 227.9014206546.

It can be divided in two parts, 11836 and 985, that added together give a palindrome (12821).

The spelling of 11836985 in words is "eleven million, eight hundred thirty-six thousand, nine hundred eighty-five".