11117381 has 4 divisors (see below), whose sum is σ = 12128064. Its totient is φ = 10106700.

The previous prime is 11117369. The next prime is 11117383. The reversal of 11117381 is 18371111.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-11117381 is a prime.

It is a super-2 number, since 2×11117381² = 247192320598322, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11117383) by changing a digit.

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, 505325 + ... + 505346.

It is an arithmetic number, because the mean of its divisors is an integer number (3032016).

Almost surely, 2^11117381 is an apocalyptic number.

11117381 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

11117381 is a deficient number, since it is larger than the sum of its proper divisors (1010683).

11117381 is a wasteful number, since it uses less digits than its factorization.

11117381 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1010682.

The product of its digits is 168, while the sum is 23.

The square root of 11117381 is about 3334.2736840278. The cubic root of 11117381 is about 223.1862815038.

Adding to 11117381 its reverse (18371111), we get a palindrome (29488492).

It can be divided in two parts, 111 and 17381, that multiplied together give a palindrome (1929291).

The spelling of 11117381 in words is "eleven million, one hundred seventeen thousand, three hundred eighty-one".