11847470389 has 4 divisors (see below), whose sum is σ = 11850111756. Its totient is φ = 11844829024.

The previous prime is 11847470347. The next prime is 11847470449. The reversal of 11847470389 is 98307474811.

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

It can be written as a sum of positive squares in 2 ways, for example, as 6524600625 + 5322869764 = 80775^2 + 72958^2 .

It is a cyclic number.

It is not a de Polignac number, because 11847470389 - 2¹¹ = 11847468341 is a prime.

It is a super-2 number, since 2×11847470389² (a number of 21 digits) 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 (11847470989) 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, 1313944 + ... + 1322929.

It is an arithmetic number, because the mean of its divisors is an integer number (2962527939).

Almost surely, 2^11847470389 is an apocalyptic number.

It is an amenable number.

11847470389 is a deficient number, since it is larger than the sum of its proper divisors (2641367).

11847470389 is an equidigital number, since it uses as much as digits as its factorization.

11847470389 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2641366.

The product of its (nonzero) digits is 1354752, while the sum is 52.

The spelling of 11847470389 in words is "eleven billion, eight hundred forty-seven million, four hundred seventy thousand, three hundred eighty-nine".