8538139 has 4 divisors (see below), whose sum is σ = 8544424. Its totient is φ = 8531856.

The previous prime is 8538107. The next prime is 8538143. The reversal of 8538139 is 9318358.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 8538139 - 2⁵ = 8538107 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 8538098 and 8538107.

It is not an unprimeable number, because it can be changed into a prime (8538149) 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, 162 + ... + 4135.

It is an arithmetic number, because the mean of its divisors is an integer number (2136106).

Almost surely, 2^8538139 is an apocalyptic number.

8538139 is a deficient number, since it is larger than the sum of its proper divisors (6285).

8538139 is a wasteful number, since it uses less digits than its factorization.

8538139 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6284.

The product of its digits is 25920, while the sum is 37.

The square root of 8538139 is about 2922.0094113469. The cubic root of 8538139 is about 204.3875354779.

The spelling of 8538139 in words is "eight million, five hundred thirty-eight thousand, one hundred thirty-nine".