82870505 has 8 divisors (see below), whose sum is σ = 99582912. Its totient is φ = 66204208.

The previous prime is 82870451. The next prime is 82870519. The reversal of 82870505 is 50507828.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 82870505 - 2⁶ = 82870441 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7439 + ... + 14868.

It is an arithmetic number, because the mean of its divisors is an integer number (12447864).

Almost surely, 2^82870505 is an apocalyptic number.

It is an amenable number.

82870505 is a deficient number, since it is larger than the sum of its proper divisors (16712407).

82870505 is a wasteful number, since it uses less digits than its factorization.

82870505 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23055.

The product of its (nonzero) digits is 22400, while the sum is 35.

The square root of 82870505 is about 9103.3238435200. The cubic root of 82870505 is about 435.9800951129.

The spelling of 82870505 in words is "eighty-two million, eight hundred seventy thousand, five hundred five".