8185139 has 2 divisors, whose sum is σ = 8185140. Its totient is φ = 8185138.

The previous prime is 8185127. The next prime is 8185157. The reversal of 8185139 is 9315818.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 8185139 - 2⁴ = 8185123 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 8185099 and 8185108.

It is not a weakly prime, because it can be changed into another prime (8185159) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4092569 + 4092570.

It is an arithmetic number, because the mean of its divisors is an integer number (4092570).

Almost surely, 2^8185139 is an apocalyptic number.

8185139 is a deficient number, since it is larger than the sum of its proper divisors (1).

8185139 is an equidigital number, since it uses as much as digits as its factorization.

8185139 is an evil number, because the sum of its binary digits is even.

The product of its digits is 8640, while the sum is 35.

The square root of 8185139 is about 2860.9681927627. The cubic root of 8185139 is about 201.5310741503.

The spelling of 8185139 in words is "eight million, one hundred eighty-five thousand, one hundred thirty-nine".