43485587309 has 4 divisors (see below), whose sum is σ = 43486874460. Its totient is φ = 43484300160.

The previous prime is 43485587297. The next prime is 43485587323. The reversal of 43485587309 is 90378558434.

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 32533336900 + 10952250409 = 180370^2 + 104653^2 .

It is a cyclic number.

It is not a de Polignac number, because 43485587309 - 2⁴ = 43485587293 is a prime.

It is a super-2 number, since 2×43485587309² (a number of 22 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 (43485587329) 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, 591494 + ... + 660935.

It is an arithmetic number, because the mean of its divisors is an integer number (10871718615).

Almost surely, 2^43485587309 is an apocalyptic number.

It is an amenable number.

43485587309 is a deficient number, since it is larger than the sum of its proper divisors (1287151).

43485587309 is a wasteful number, since it uses less digits than its factorization.

43485587309 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1287150.

The product of its (nonzero) digits is 14515200, while the sum is 56.

The spelling of 43485587309 in words is "forty-three billion, four hundred eighty-five million, five hundred eighty-seven thousand, three hundred nine".