43539346939 has 32 divisors (see below), whose sum is σ = 49461350400. Its totient is φ = 37963779840.

The previous prime is 43539346919. The next prime is 43539346973. The reversal of 43539346939 is 93964393534.

It is a cyclic number.

It is not a de Polignac number, because 43539346939 - 2¹⁵ = 43539314171 is a prime.

It is not an unprimeable number, because it can be changed into a prime (43539346919) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 40054054 + ... + 40055140.

It is an arithmetic number, because the mean of its divisors is an integer number (1545667200).

Almost surely, 2^43539346939 is an apocalyptic number.

43539346939 is a deficient number, since it is larger than the sum of its proper divisors (5922003461).

43539346939 is a wasteful number, since it uses less digits than its factorization.

43539346939 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1843.

The product of its digits is 28343520, while the sum is 58.

The spelling of 43539346939 in words is "forty-three billion, five hundred thirty-nine million, three hundred forty-six thousand, nine hundred thirty-nine".