11931085 has 4 divisors (see below), whose sum is σ = 14317308. Its totient is φ = 9544864.

The previous prime is 11931079. The next prime is 11931113. The reversal of 11931085 is 58013911.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 58013911 = 17 ⋅3412583.

It can be written as a sum of positive squares in 2 ways, for example, as 3526884 + 8404201 = 1878^2 + 2899^2 .

It is a cyclic number.

It is not a de Polignac number, because 11931085 - 2¹¹ = 11929037 is a prime.

It is a Duffinian number.

It is a congruent 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, 1193104 + ... + 1193113.

It is an arithmetic number, because the mean of its divisors is an integer number (3579327).

Almost surely, 2^11931085 is an apocalyptic number.

It is an amenable number.

11931085 is a deficient number, since it is larger than the sum of its proper divisors (2386223).

11931085 is an equidigital number, since it uses as much as digits as its factorization.

11931085 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2386222.

The product of its (nonzero) digits is 1080, while the sum is 28.

The square root of 11931085 is about 3454.1402693000. The cubic root of 11931085 is about 228.5037402807.

Adding to 11931085 its reverse (58013911), we get a palindrome (69944996).

It can be divided in two parts, 1193 and 1085, that added together give a triangular number (2278 = T₆₇).

The spelling of 11931085 in words is "eleven million, nine hundred thirty-one thousand, eighty-five".