11656513 has 4 divisors (see below), whose sum is σ = 12716208. Its totient is φ = 10596820.

The previous prime is 11656507. The next prime is 11656531. The reversal of 11656513 is 31565611.

11656513 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, 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 11656513 - 2¹³ = 11648321 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11656553) 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, 529831 + ... + 529852.

It is an arithmetic number, because the mean of its divisors is an integer number (3179052).

Almost surely, 2^11656513 is an apocalyptic number.

It is an amenable number.

11656513 is a deficient number, since it is larger than the sum of its proper divisors (1059695).

11656513 is a wasteful number, since it uses less digits than its factorization.

11656513 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1059694.

The product of its digits is 2700, while the sum is 28.

The square root of 11656513 is about 3414.1635871762. The cubic root of 11656513 is about 226.7372547838.

The spelling of 11656513 in words is "eleven million, six hundred fifty-six thousand, five hundred thirteen".