82138965 has 16 divisors (see below), whose sum is σ = 132428736. Its totient is φ = 43472000.

The previous prime is 82138963. The next prime is 82138967. The reversal of 82138965 is 56983128.

It is an interprime number because it is at equal distance from previous prime (82138963) and next prime (82138967).

It is not a de Polignac number, because 82138965 - 2¹ = 82138963 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (82138961) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 18936 + ... + 22865.

It is an arithmetic number, because the mean of its divisors is an integer number (8276796).

Almost surely, 2^82138965 is an apocalyptic number.

It is an amenable number.

82138965 is a deficient number, since it is larger than the sum of its proper divisors (50289771).

82138965 is a wasteful number, since it uses less digits than its factorization.

82138965 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41940.

The product of its digits is 103680, while the sum is 42.

The square root of 82138965 is about 9063.0549485259. The cubic root of 82138965 is about 434.6934291231.

The spelling of 82138965 in words is "eighty-two million, one hundred thirty-eight thousand, nine hundred sixty-five".