11538993 has 4 divisors (see below), whose sum is σ = 15385328. Its totient is φ = 7692660.

The previous prime is 11538979. The next prime is 11538997. The reversal of 11538993 is 39983511.

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.

It is not a de Polignac number, because 11538993 - 2⁹ = 11538481 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11538997) 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, 1923163 + ... + 1923168.

It is an arithmetic number, because the mean of its divisors is an integer number (3846332).

Almost surely, 2^11538993 is an apocalyptic number.

It is an amenable number.

11538993 is a deficient number, since it is larger than the sum of its proper divisors (3846335).

11538993 is an equidigital number, since it uses as much as digits as its factorization.

11538993 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3846334.

The product of its digits is 29160, while the sum is 39.

The square root of 11538993 is about 3396.9093305533. The cubic root of 11538993 is about 225.9726975137.

The spelling of 11538993 in words is "eleven million, five hundred thirty-eight thousand, nine hundred ninety-three".