11681419 has 4 divisors (see below), whose sum is σ = 11801944. Its totient is φ = 11560896.

The previous prime is 11681413. The next prime is 11681429. The reversal of 11681419 is 91418611.

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 11681419 - 2⁷ = 11681291 is a prime.

It is a super-2 number, since 2×11681419² = 272911099707122, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11681413) 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 3 ways as a sum of consecutive naturals, for example, 60117 + ... + 60310.

It is an arithmetic number, because the mean of its divisors is an integer number (2950486).

Almost surely, 2^11681419 is an apocalyptic number.

11681419 is a deficient number, since it is larger than the sum of its proper divisors (120525).

11681419 is an equidigital number, since it uses as much as digits as its factorization.

11681419 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 120524.

The product of its digits is 1728, while the sum is 31.

The square root of 11681419 is about 3417.8090935569. The cubic root of 11681419 is about 226.8986266808.

It can be divided in two parts, 11681 and 419, that added together give a square (12100 = 110²).

The spelling of 11681419 in words is "eleven million, six hundred eighty-one thousand, four hundred nineteen".