8135438193 has 24 divisors (see below), whose sum is σ = 11880535680. Its totient is φ = 5364045600.

The previous prime is 8135438173. The next prime is 8135438239. The reversal of 8135438193 is 3918345318.

8135438193 is a `hidden beast` number, since 8 + 13 + 543 + 8 + 1 + 93 = 666.

It is not a de Polignac number, because 8135438193 - 2¹⁰ = 8135437169 is a prime.

It is a Smith number, since the sum of its digits (45) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (8135438173) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 921880 + ... + 930662.

It is an arithmetic number, because the mean of its divisors is an integer number (495022320).

Almost surely, 2^8135438193 is an apocalyptic number.

It is an amenable number.

8135438193 is a deficient number, since it is larger than the sum of its proper divisors (3745097487).

8135438193 is a wasteful number, since it uses less digits than its factorization.

8135438193 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9909 (or 9906 counting only the distinct ones).

The product of its digits is 311040, while the sum is 45.

The square root of 8135438193 is about 90196.6639793291. The cubic root of 8135438193 is about 2011.2234157397.

The spelling of 8135438193 in words is "eight billion, one hundred thirty-five million, four hundred thirty-eight thousand, one hundred ninety-three".