11728993 has 4 divisors (see below), whose sum is σ = 12015108. Its totient is φ = 11442880.

The previous prime is 11728973. The next prime is 11729009. The reversal of 11728993 is 39982711.

11728993 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 39982711 = 5711 ⋅7001.

It can be written as a sum of positive squares in 2 ways, for example, as 4695889 + 7033104 = 2167^2 + 2652^2 .

It is a cyclic number.

It is not a de Polignac number, because 11728993 - 2⁵ = 11728961 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11728903) 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, 142996 + ... + 143077.

It is an arithmetic number, because the mean of its divisors is an integer number (3003777).

Almost surely, 2^11728993 is an apocalyptic number.

It is an amenable number.

11728993 is a deficient number, since it is larger than the sum of its proper divisors (286115).

11728993 is an equidigital number, since it uses as much as digits as its factorization.

11728993 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 286114.

The product of its digits is 27216, while the sum is 40.

The square root of 11728993 is about 3424.7617435378. The cubic root of 11728993 is about 227.2062335562.

It can be divided in two parts, 11728 and 993, that added together give a palindrome (12721).

The spelling of 11728993 in words is "eleven million, seven hundred twenty-eight thousand, nine hundred ninety-three".