11631385 has 4 divisors (see below), whose sum is σ = 13957668. Its totient is φ = 9305104.

The previous prime is 11631341. The next prime is 11631391. The reversal of 11631385 is 58313611.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 1996569 + 9634816 = 1413^2 + 3104^2 .

It is a cyclic number.

It is not a de Polignac number, because 11631385 - 2¹¹ = 11629337 is a prime.

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, 1163134 + ... + 1163143.

It is an arithmetic number, because the mean of its divisors is an integer number (3489417).

Almost surely, 2^11631385 is an apocalyptic number.

It is an amenable number.

11631385 is a deficient number, since it is larger than the sum of its proper divisors (2326283).

11631385 is an equidigital number, since it uses as much as digits as its factorization.

11631385 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2326282.

The product of its digits is 2160, while the sum is 28.

The square root of 11631385 is about 3410.4816375404. The cubic root of 11631385 is about 226.5742113803.

Adding to 11631385 its reverse (58313611), we get a palindrome (69944996).

The spelling of 11631385 in words is "eleven million, six hundred thirty-one thousand, three hundred eighty-five".