8538172099 has 2 divisors, whose sum is σ = 8538172100. Its totient is φ = 8538172098.

The previous prime is 8538172039. The next prime is 8538172103. The reversal of 8538172099 is 9902718358.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 8538172099 - 2¹⁵ = 8538139331 is a prime.

It is not a weakly prime, because it can be changed into another prime (8538172039) 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 as a sum of consecutive naturals, namely, 4269086049 + 4269086050.

It is an arithmetic number, because the mean of its divisors is an integer number (4269086050).

Almost surely, 2^8538172099 is an apocalyptic number.

8538172099 is a deficient number, since it is larger than the sum of its proper divisors (1).

8538172099 is an equidigital number, since it uses as much as digits as its factorization.

8538172099 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1088640, while the sum is 52.

The square root of 8538172099 is about 92402.2299460354. The cubic root of 8538172099 is about 2043.8779958754.

The spelling of 8538172099 in words is "eight billion, five hundred thirty-eight million, one hundred seventy-two thousand, ninety-nine".