11965213 has 8 divisors (see below), whose sum is σ = 13160448. Its totient is φ = 10809264.

The previous prime is 11965207. The next prime is 11965237. The reversal of 11965213 is 31256911.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 11965213 - 2⁵ = 11965181 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11965253) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9181 + ... + 10402.

It is an arithmetic number, because the mean of its divisors is an integer number (1645056).

Almost surely, 2^11965213 is an apocalyptic number.

11965213 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

It is an amenable number.

11965213 is a deficient number, since it is larger than the sum of its proper divisors (1195235).

11965213 is a wasteful number, since it uses less digits than its factorization.

11965213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19643.

The product of its digits is 1620, while the sum is 28.

The square root of 11965213 is about 3459.0768999836. The cubic root of 11965213 is about 228.7214056447.

The spelling of 11965213 in words is "eleven million, nine hundred sixty-five thousand, two hundred thirteen".