11859919 has 4 divisors (see below), whose sum is σ = 11876344. Its totient is φ = 11843496.

The previous prime is 11859917. The next prime is 11859923. The reversal of 11859919 is 91995811.

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 11859919 - 2¹ = 11859917 is a prime.

It is a super-2 number, since 2×11859919² = 281315357373122, 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 (11859917) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7077 + ... + 8590.

It is an arithmetic number, because the mean of its divisors is an integer number (2969086).

Almost surely, 2^11859919 is an apocalyptic number.

11859919 is a deficient number, since it is larger than the sum of its proper divisors (16425).

11859919 is an equidigital number, since it uses as much as digits as its factorization.

11859919 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16424.

The product of its digits is 29160, while the sum is 43.

The square root of 11859919 is about 3443.8233113794. The cubic root of 11859919 is about 228.0485110176.

The spelling of 11859919 in words is "eleven million, eight hundred fifty-nine thousand, nine hundred nineteen".