11439019243 has 4 divisors (see below), whose sum is σ = 11476280200. Its totient is φ = 11401758288.

The previous prime is 11439019183. The next prime is 11439019259. The reversal of 11439019243 is 34291093411.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-11439019243 is a prime.

It is a super-2 number, since 2×11439019243² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11439016243) 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, 18630018 + ... + 18630631.

It is an arithmetic number, because the mean of its divisors is an integer number (2869070050).

Almost surely, 2^11439019243 is an apocalyptic number.

11439019243 is a deficient number, since it is larger than the sum of its proper divisors (37260957).

11439019243 is an equidigital number, since it uses as much as digits as its factorization.

11439019243 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37260956.

The product of its (nonzero) digits is 23328, while the sum is 37.

The spelling of 11439019243 in words is "eleven billion, four hundred thirty-nine million, nineteen thousand, two hundred forty-three".