11533897 has 4 divisors (see below), whose sum is σ = 11648196. Its totient is φ = 11419600.

The previous prime is 11533889. The next prime is 11533919. The reversal of 11533897 is 79833511.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 10055241 + 1478656 = 3171^2 + 1216^2 .

It is a cyclic number.

It is not a de Polignac number, because 11533897 - 2³ = 11533889 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11533867) 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, 56998 + ... + 57199.

It is an arithmetic number, because the mean of its divisors is an integer number (2912049).

Almost surely, 2^11533897 is an apocalyptic number.

It is an amenable number.

11533897 is a deficient number, since it is larger than the sum of its proper divisors (114299).

11533897 is a wasteful number, since it uses less digits than its factorization.

11533897 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 114298.

The product of its digits is 22680, while the sum is 37.

The square root of 11533897 is about 3396.1591541034. The cubic root of 11533897 is about 225.9394269492.

It can be divided in two parts, 1153 and 3897, that added together give a triangular number (5050 = T₁₀₀).

The spelling of 11533897 in words is "eleven million, five hundred thirty-three thousand, eight hundred ninety-seven".