11890919 has 12 divisors (see below), whose sum is σ = 12493800. Its totient is φ = 11312784.

The previous prime is 11890909. The next prime is 11890927. The reversal of 11890919 is 91909811.

It is a happy number.

It is a de Polignac number, because none of the positive numbers 2^k-11890919 is a prime.

It is a super-2 number, since 2×11890919² = 282787909329122, which contains 22 as substring.

It is a Smith number, since the sum of its digits (38) coincides with the sum of the digits of its prime factors.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11890909) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 109037 + ... + 109145.

It is an arithmetic number, because the mean of its divisors is an integer number (1041150).

Almost surely, 2^11890919 is an apocalyptic number.

11890919 is a deficient number, since it is larger than the sum of its proper divisors (602881).

11890919 is an equidigital number, since it uses as much as digits as its factorization.

11890919 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 254 (or 211 counting only the distinct ones).

The product of its (nonzero) digits is 5832, while the sum is 38.

The square root of 11890919 is about 3448.3211857366. The cubic root of 11890919 is about 228.2470327006.

The spelling of 11890919 in words is "eleven million, eight hundred ninety thousand, nine hundred nineteen".