82785913 has 8 divisors (see below), whose sum is σ = 94883328. Its totient is φ = 70756224.

The previous prime is 82785881. The next prime is 82785959. The reversal of 82785913 is 31958728.

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

It is not a de Polignac number, because 82785913 - 2⁵ = 82785881 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 82785913.

It is not an unprimeable number, because it can be changed into a prime (82785973) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 14281 + ... + 19222.

It is an arithmetic number, because the mean of its divisors is an integer number (11860416).

Almost surely, 2^82785913 is an apocalyptic number.

It is an amenable number.

82785913 is a deficient number, since it is larger than the sum of its proper divisors (12097415).

82785913 is a wasteful number, since it uses less digits than its factorization.

82785913 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33863.

The product of its digits is 120960, while the sum is 43.

The square root of 82785913 is about 9098.6764422085. The cubic root of 82785913 is about 435.8316989931.

The spelling of 82785913 in words is "eighty-two million, seven hundred eighty-five thousand, nine hundred thirteen".