43979332169 has 4 divisors (see below), whose sum is σ = 44432727444. Its totient is φ = 43525936896.

The previous prime is 43979332141. The next prime is 43979332207. The reversal of 43979332169 is 96123397934.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 96123397934 = 2 ⋅48061698967.

It can be written as a sum of positive squares in 2 ways, for example, as 32801556544 + 11177775625 = 181112^2 + 105725^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-43979332169 is a prime.

It is a super-2 number, since 2×43979332169² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (43979332139) 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, 226697492 + ... + 226697685.

It is an arithmetic number, because the mean of its divisors is an integer number (11108181861).

Almost surely, 2^43979332169 is an apocalyptic number.

It is an amenable number.

43979332169 is a deficient number, since it is larger than the sum of its proper divisors (453395275).

43979332169 is an equidigital number, since it uses as much as digits as its factorization.

43979332169 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 453395274.

The product of its digits is 6613488, while the sum is 56.

The spelling of 43979332169 in words is "forty-three billion, nine hundred seventy-nine million, three hundred thirty-two thousand, one hundred sixty-nine".