43669406309 has 4 divisors (see below), whose sum is σ = 43682027340. Its totient is φ = 43656785280.

The previous prime is 43669406303. The next prime is 43669406323. The reversal of 43669406309 is 90360496634.

It is a happy number.

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 16090161409 + 27579244900 = 126847^2 + 166070^2 .

It is a cyclic number.

It is not a de Polignac number, because 43669406309 - 2⁴ = 43669406293 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (43669406303) 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, 6305324 + ... + 6312245.

It is an arithmetic number, because the mean of its divisors is an integer number (10920506835).

Almost surely, 2^43669406309 is an apocalyptic number.

It is an amenable number.

43669406309 is a deficient number, since it is larger than the sum of its proper divisors (12621031).

43669406309 is a wasteful number, since it uses less digits than its factorization.

43669406309 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12621030.

The product of its (nonzero) digits is 2519424, while the sum is 50.

The spelling of 43669406309 in words is "forty-three billion, six hundred sixty-nine million, four hundred six thousand, three hundred nine".