11199487 has 4 divisors (see below), whose sum is σ = 12061000. Its totient is φ = 10337976.

The previous prime is 11199473. The next prime is 11199491. The reversal of 11199487 is 78499111.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 78499111 = 6037 ⋅13003.

It is a cyclic number.

It is not a de Polignac number, because 11199487 - 2⁷ = 11199359 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 (11199427) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 430737 + ... + 430762.

It is an arithmetic number, because the mean of its divisors is an integer number (3015250).

Almost surely, 2^11199487 is an apocalyptic number.

11199487 is a deficient number, since it is larger than the sum of its proper divisors (861513).

11199487 is an equidigital number, since it uses as much as digits as its factorization.

11199487 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 861512.

The product of its digits is 18144, while the sum is 40.

The square root of 11199487 is about 3346.5634612241. The cubic root of 11199487 is about 223.7343723675.

The spelling of 11199487 in words is "eleven million, one hundred ninety-nine thousand, four hundred eighty-seven".