11531917 has 4 divisors (see below), whose sum is σ = 12138880. Its totient is φ = 10924956.

The previous prime is 11531909. The next prime is 11531921. The reversal of 11531917 is 71913511.

11531917 is digitally balanced in base 3, 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 a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 11531917 - 2³ = 11531909 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 (11531977) 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, 303453 + ... + 303490.

It is an arithmetic number, because the mean of its divisors is an integer number (3034720).

Almost surely, 2^11531917 is an apocalyptic number.

It is an amenable number.

11531917 is a deficient number, since it is larger than the sum of its proper divisors (606963).

11531917 is an equidigital number, since it uses as much as digits as its factorization.

11531917 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 606962.

The product of its digits is 945, while the sum is 28.

The square root of 11531917 is about 3395.8676358186. The cubic root of 11531917 is about 225.9264973595.

The spelling of 11531917 in words is "eleven million, five hundred thirty-one thousand, nine hundred seventeen".