11968519 has 4 divisors (see below), whose sum is σ = 11989296. Its totient is φ = 11947744.

The previous prime is 11968507. The next prime is 11968547. The reversal of 11968519 is 91586911.

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

It is a cyclic number.

It is not a de Polignac number, because 11968519 - 2⁹ = 11968007 is a prime.

It is a super-2 number, since 2×11968519² = 286490894106722, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11968819) 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, 9499 + ... + 10684.

It is an arithmetic number, because the mean of its divisors is an integer number (2997324).

Almost surely, 2^11968519 is an apocalyptic number.

11968519 is a deficient number, since it is larger than the sum of its proper divisors (20777).

11968519 is an equidigital number, since it uses as much as digits as its factorization.

11968519 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20776.

The product of its digits is 19440, while the sum is 40.

The square root of 11968519 is about 3459.5547401364. The cubic root of 11968519 is about 228.7424690206.

The spelling of 11968519 in words is "eleven million, nine hundred sixty-eight thousand, five hundred nineteen".