82129535 has 4 divisors (see below), whose sum is σ = 98555448. Its totient is φ = 65703624.

The previous prime is 82129513. The next prime is 82129543. The reversal of 82129535 is 53592128.

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

It is a cyclic number.

It is not a de Polignac number, because 82129535 - 2⁸ = 82129279 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 82129495 and 82129504.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8212949 + ... + 8212958.

It is an arithmetic number, because the mean of its divisors is an integer number (24638862).

Almost surely, 2^82129535 is an apocalyptic number.

82129535 is a deficient number, since it is larger than the sum of its proper divisors (16425913).

82129535 is a wasteful number, since it uses less digits than its factorization.

82129535 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16425912.

The product of its digits is 21600, while the sum is 35.

The square root of 82129535 is about 9062.5346895888. The cubic root of 82129535 is about 434.6767934297.

The spelling of 82129535 in words is "eighty-two million, one hundred twenty-nine thousand, five hundred thirty-five".