11553691 has 4 divisors (see below), whose sum is σ = 12161800. Its totient is φ = 10945584.

The previous prime is 11553679. The next prime is 11553709. The reversal of 11553691 is 19635511.

11553691 is digitally balanced in base 2, 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.

It is a cyclic number.

It is not a de Polignac number, because 11553691 - 2¹¹ = 11551643 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11553601) 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, 304026 + ... + 304063.

It is an arithmetic number, because the mean of its divisors is an integer number (3040450).

Almost surely, 2^11553691 is an apocalyptic number.

11553691 is a deficient number, since it is larger than the sum of its proper divisors (608109).

11553691 is an equidigital number, since it uses as much as digits as its factorization.

11553691 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 608108.

The product of its digits is 4050, while the sum is 31.

The square root of 11553691 is about 3399.0720792593. The cubic root of 11553691 is about 226.0686024017.

The spelling of 11553691 in words is "eleven million, five hundred fifty-three thousand, six hundred ninety-one".