11830381 has 4 divisors (see below), whose sum is σ = 11872764. Its totient is φ = 11788000.

The previous prime is 11830363. The next prime is 11830387. The reversal of 11830381 is 18303811.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 18303811 = 701 ⋅26111.

It can be written as a sum of positive squares in 2 ways, for example, as 8608356 + 3222025 = 2934^2 + 1795^2 .

It is a cyclic number.

It is not a de Polignac number, because 11830381 - 2⁷ = 11830253 is a prime.

It is a super-2 number, since 2×11830381² = 279915829210322, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11830387) 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, 20770 + ... + 21331.

It is an arithmetic number, because the mean of its divisors is an integer number (2968191).

Almost surely, 2^11830381 is an apocalyptic number.

It is an amenable number.

11830381 is a deficient number, since it is larger than the sum of its proper divisors (42383).

11830381 is an equidigital number, since it uses as much as digits as its factorization.

11830381 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42382.

The product of its (nonzero) digits is 576, while the sum is 25.

The square root of 11830381 is about 3439.5320902704. The cubic root of 11830381 is about 227.8590297652.

The spelling of 11830381 in words is "eleven million, eight hundred thirty thousand, three hundred eighty-one".