82139135 has 32 divisors (see below), whose sum is σ = 109626048. Its totient is φ = 58705920.

The previous prime is 82139077. The next prime is 82139137. The reversal of 82139135 is 53193128.

It is not a de Polignac number, because 82139135 - 2¹⁶ = 82073599 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (82139137) 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 in 31 ways as a sum of consecutive naturals, for example, 389180 + ... + 389390.

It is an arithmetic number, because the mean of its divisors is an integer number (3425814).

Almost surely, 2^82139135 is an apocalyptic number.

82139135 is a deficient number, since it is larger than the sum of its proper divisors (27486913).

82139135 is a wasteful number, since it uses less digits than its factorization.

82139135 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 395.

The product of its digits is 6480, while the sum is 32.

The square root of 82139135 is about 9063.0643272571. The cubic root of 82139135 is about 434.6937290126.

The spelling of 82139135 in words is "eighty-two million, one hundred thirty-nine thousand, one hundred thirty-five".