11723381 has 4 divisors (see below), whose sum is σ = 11730432. Its totient is φ = 11716332.

The previous prime is 11723377. The next prime is 11723401. The reversal of 11723381 is 18332711.

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, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 18332711 = 1861 ⋅9851.

It is a cyclic number.

It is not a de Polignac number, because 11723381 - 2² = 11723377 is a prime.

It is a super-2 number, since 2×11723381² = 274875324142322, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 11723381.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11723281) by changing a digit.

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, 506 + ... + 4868.

It is an arithmetic number, because the mean of its divisors is an integer number (2932608).

Almost surely, 2^11723381 is an apocalyptic number.

It is an amenable number.

11723381 is a deficient number, since it is larger than the sum of its proper divisors (7051).

11723381 is an equidigital number, since it uses as much as digits as its factorization.

11723381 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7050.

The product of its digits is 1008, while the sum is 26.

The square root of 11723381 is about 3423.9423184394. The cubic root of 11723381 is about 227.1699904675.

The spelling of 11723381 in words is "eleven million, seven hundred twenty-three thousand, three hundred eighty-one".