11089831 has 4 divisors (see below), whose sum is σ = 11742192. Its totient is φ = 10437472.

The previous prime is 11089823. The next prime is 11089843. The reversal of 11089831 is 13898011.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 13898011 = 67 ⋅207433.

It is a cyclic number.

It is not a de Polignac number, because 11089831 - 2³ = 11089823 is a prime.

It is a super-2 number, since 2×11089831² = 245968703217122, which contains 22 as substring.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 11089793 and 11089802.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11089811) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 326155 + ... + 326188.

It is an arithmetic number, because the mean of its divisors is an integer number (2935548).

Almost surely, 2^11089831 is an apocalyptic number.

11089831 is a deficient number, since it is larger than the sum of its proper divisors (652361).

11089831 is an equidigital number, since it uses as much as digits as its factorization.

11089831 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 652360.

The product of its (nonzero) digits is 1728, while the sum is 31.

The square root of 11089831 is about 3330.1397868558. The cubic root of 11089831 is about 223.0017695771.

The spelling of 11089831 in words is "eleven million, eighty-nine thousand, eight hundred thirty-one".