43401344309 has 8 divisors (see below), whose sum is σ = 43976655960. Its totient is φ = 42829387776.

The previous prime is 43401344297. The next prime is 43401344341. The reversal of 43401344309 is 90344310434.

It can be written as a sum of positive squares in 4 ways, for example, as 13376079025 + 30025265284 = 115655^2 + 173278^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 43401344309 - 2¹⁶ = 43401278773 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 (43401344209) 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, 812732 + ... + 864485.

It is an arithmetic number, because the mean of its divisors is an integer number (5497081995).

Almost surely, 2^43401344309 is an apocalyptic number.

It is an amenable number.

43401344309 is a deficient number, since it is larger than the sum of its proper divisors (575311651).

43401344309 is a wasteful number, since it uses less digits than its factorization.

43401344309 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1677559.

The product of its (nonzero) digits is 62208, while the sum is 35.

The spelling of 43401344309 in words is "forty-three billion, four hundred one million, three hundred forty-four thousand, three hundred nine".