65005139 has 2 divisors, whose sum is σ = 65005140. Its totient is φ = 65005138.

The previous prime is 65005133. The next prime is 65005147. The reversal of 65005139 is 93150056.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 65005139 - 2⁴ = 65005123 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (65005133) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32502569 + 32502570.

It is an arithmetic number, because the mean of its divisors is an integer number (32502570).

Almost surely, 2^65005139 is an apocalyptic number.

65005139 is a deficient number, since it is larger than the sum of its proper divisors (1).

65005139 is an equidigital number, since it uses as much as digits as its factorization.

65005139 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4050, while the sum is 29.

The square root of 65005139 is about 8062.5764492500. The cubic root of 65005139 is about 402.0831717385.

The spelling of 65005139 in words is "sixty-five million, five thousand, one hundred thirty-nine".