11649213 has 12 divisors (see below), whose sum is σ = 17407260. Its totient is φ = 7498176.

The previous prime is 11649179. The next prime is 11649221. The reversal of 11649213 is 31294611.

11649213 is a `hidden beast` number, since 1 + 1 + 649 + 2 + 13 = 666.

11649213 is digitally balanced in base 2 and base 3, because in such bases it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 8398404 + 3250809 = 2898^2 + 1803^2 .

It is not a de Polignac number, because 11649213 - 2²⁰ = 10600637 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11649263) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 22056 + ... + 22577.

It is an arithmetic number, because the mean of its divisors is an integer number (1450605).

Almost surely, 2^11649213 is an apocalyptic number.

It is an amenable number.

11649213 is a deficient number, since it is larger than the sum of its proper divisors (5758047).

11649213 is a wasteful number, since it uses less digits than its factorization.

11649213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44668 (or 44665 counting only the distinct ones).

The product of its digits is 1296, while the sum is 27.

The square root of 11649213 is about 3413.0943438469. The cubic root of 11649213 is about 226.6899127927.

The spelling of 11649213 in words is "eleven million, six hundred forty-nine thousand, two hundred thirteen".