82685129 has 4 divisors (see below), whose sum is σ = 83817876. Its totient is φ = 81552384.

The previous prime is 82685107. The next prime is 82685147. The reversal of 82685129 is 92158628.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 69689104 + 12996025 = 8348^2 + 3605^2 .

It is a cyclic number.

It is not a de Polignac number, because 82685129 - 2¹² = 82681033 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (82685159) 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, 566264 + ... + 566409.

It is an arithmetic number, because the mean of its divisors is an integer number (20954469).

Almost surely, 2^82685129 is an apocalyptic number.

It is an amenable number.

82685129 is a deficient number, since it is larger than the sum of its proper divisors (1132747).

82685129 is a wasteful number, since it uses less digits than its factorization.

82685129 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1132746.

The product of its digits is 69120, while the sum is 41.

The square root of 82685129 is about 9093.1363676127. The cubic root of 82685129 is about 435.6547659167.

The spelling of 82685129 in words is "eighty-two million, six hundred eighty-five thousand, one hundred twenty-nine".