11523149 has 4 divisors (see below), whose sum is σ = 12570720. Its totient is φ = 10475580.

The previous prime is 11523143. The next prime is 11523157. The reversal of 11523149 is 94132511.

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 a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-11523149 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 (11523143) 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, 523769 + ... + 523790.

It is an arithmetic number, because the mean of its divisors is an integer number (3142680).

Almost surely, 2^11523149 is an apocalyptic number.

It is an amenable number.

11523149 is a deficient number, since it is larger than the sum of its proper divisors (1047571).

11523149 is a wasteful number, since it uses less digits than its factorization.

11523149 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1047570.

The product of its digits is 1080, while the sum is 26.

The square root of 11523149 is about 3394.5764095097. The cubic root of 11523149 is about 225.8692236848.

The spelling of 11523149 in words is "eleven million, five hundred twenty-three thousand, one hundred forty-nine".