11493821 has 4 divisors (see below), whose sum is σ = 11612412. Its totient is φ = 11375232.

The previous prime is 11493799. The next prime is 11493827. The reversal of 11493821 is 12839411.

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 2856100 + 8637721 = 1690^2 + 2939^2 .

It is a cyclic number.

It is not a de Polignac number, because 11493821 - 2¹⁸ = 11231677 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11493827) 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, 59150 + ... + 59343.

It is an arithmetic number, because the mean of its divisors is an integer number (2903103).

Almost surely, 2^11493821 is an apocalyptic number.

It is an amenable number.

11493821 is a deficient number, since it is larger than the sum of its proper divisors (118591).

11493821 is an equidigital number, since it uses as much as digits as its factorization.

11493821 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 118590.

The product of its digits is 1728, while the sum is 29.

The square root of 11493821 is about 3390.2538253057. The cubic root of 11493821 is about 225.6774381331.

The spelling of 11493821 in words is "eleven million, four hundred ninety-three thousand, eight hundred twenty-one".