8538172043 has 4 divisors (see below), whose sum is σ = 8540826048. Its totient is φ = 8535518040.

The previous prime is 8538172039. The next prime is 8538172099. The reversal of 8538172043 is 3402718358.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 8538172043 - 2² = 8538172039 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (8538172843) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1322171 + ... + 1328612.

It is an arithmetic number, because the mean of its divisors is an integer number (2135206512).

Almost surely, 2^8538172043 is an apocalyptic number.

8538172043 is a deficient number, since it is larger than the sum of its proper divisors (2654005).

8538172043 is a wasteful number, since it uses less digits than its factorization.

8538172043 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2654004.

The product of its (nonzero) digits is 161280, while the sum is 41.

The square root of 8538172043 is about 92402.2296430124. The cubic root of 8538172043 is about 2043.8779914069.

The spelling of 8538172043 in words is "eight billion, five hundred thirty-eight million, one hundred seventy-two thousand, forty-three".