11439819 has 8 divisors (see below), whose sum is σ = 16947920. Its totient is φ = 7626528.

The previous prime is 11439817. The next prime is 11439821. The reversal of 11439819 is 91893411.

It is an interprime number because it is at equal distance from previous prime (11439817) and next prime (11439821).

It is not a de Polignac number, because 11439819 - 2¹ = 11439817 is a prime.

It is a super-2 number, since 2×11439819² = 261738917505522, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11439811) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 211822 + ... + 211875.

It is an arithmetic number, because the mean of its divisors is an integer number (2118490).

Almost surely, 2^11439819 is an apocalyptic number.

11439819 is a deficient number, since it is larger than the sum of its proper divisors (5508101).

11439819 is an equidigital number, since it uses as much as digits as its factorization.

11439819 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 423706 (or 423700 counting only the distinct ones).

The product of its digits is 7776, while the sum is 36.

The square root of 11439819 is about 3382.2801480658. The cubic root of 11439819 is about 225.3234459227.

The spelling of 11439819 in words is "eleven million, four hundred thirty-nine thousand, eight hundred nineteen".