11523965 has 4 divisors (see below), whose sum is σ = 13828764. Its totient is φ = 9219168.

The previous prime is 11523959. The next prime is 11523973. The reversal of 11523965 is 56932511.

11523965 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.

It can be written as a sum of positive squares in 2 ways, for example, as 6497401 + 5026564 = 2549^2 + 2242^2 .

It is a cyclic number.

It is not a de Polignac number, because 11523965 - 2¹⁰ = 11522941 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1152392 + ... + 1152401.

It is an arithmetic number, because the mean of its divisors is an integer number (3457191).

Almost surely, 2^11523965 is an apocalyptic number.

It is an amenable number.

11523965 is a deficient number, since it is larger than the sum of its proper divisors (2304799).

11523965 is an equidigital number, since it uses as much as digits as its factorization.

11523965 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2304798.

The product of its digits is 8100, while the sum is 32.

The square root of 11523965 is about 3394.6965991087. The cubic root of 11523965 is about 225.8745551249.

The spelling of 11523965 in words is "eleven million, five hundred twenty-three thousand, nine hundred sixty-five".