11187949 has 8 divisors (see below), whose sum is σ = 11681048. Its totient is φ = 10704960.

The previous prime is 11187899. The next prime is 11187973. The reversal of 11187949 is 94978111.

It can be written as a sum of positive squares in 4 ways, for example, as 2673225 + 8514724 = 1635^2 + 2918^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 11187949 - 2¹¹ = 11185901 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11187149) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 222 + ... + 4735.

It is an arithmetic number, because the mean of its divisors is an integer number (1460131).

Almost surely, 2^11187949 is an apocalyptic number.

It is an amenable number.

11187949 is a deficient number, since it is larger than the sum of its proper divisors (493099).

11187949 is an equidigital number, since it uses as much as digits as its factorization.

11187949 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5055.

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

The square root of 11187949 is about 3344.8391590628. The cubic root of 11187949 is about 223.6575136630.

The spelling of 11187949 in words is "eleven million, one hundred eighty-seven thousand, nine hundred forty-nine".