11668519 has 4 divisors (see below), whose sum is σ = 11842744. Its totient is φ = 11494296.

The previous prime is 11668513. The next prime is 11668541. The reversal of 11668519 is 91586611.

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 11668519 - 2⁵ = 11668487 is a prime.

It is a super-2 number, since 2×11668519² = 272308671306722, 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 (11668513) 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, 87012 + ... + 87145.

It is an arithmetic number, because the mean of its divisors is an integer number (2960686).

Almost surely, 2^11668519 is an apocalyptic number.

11668519 is a deficient number, since it is larger than the sum of its proper divisors (174225).

11668519 is an equidigital number, since it uses as much as digits as its factorization.

11668519 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 174224.

The product of its digits is 12960, while the sum is 37.

The square root of 11668519 is about 3415.9213983931. The cubic root of 11668519 is about 226.8150731791.

It can be divided in two parts, 116 and 68519, that added together give a triangular number (68635 = T₃₇₀).

The spelling of 11668519 in words is "eleven million, six hundred sixty-eight thousand, five hundred nineteen".