82785851 has 4 divisors (see below), whose sum is σ = 83157312. Its totient is φ = 82414392.

The previous prime is 82785823. The next prime is 82785853. The reversal of 82785851 is 15858728.

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 82785851 - 2¹⁰ = 82784827 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (82785853) 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 3 ways as a sum of consecutive naturals, for example, 185396 + ... + 185841.

It is an arithmetic number, because the mean of its divisors is an integer number (20789328).

Almost surely, 2^82785851 is an apocalyptic number.

82785851 is a deficient number, since it is larger than the sum of its proper divisors (371461).

82785851 is a wasteful number, since it uses less digits than its factorization.

82785851 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 371460.

The product of its digits is 179200, while the sum is 44.

The square root of 82785851 is about 9098.6730351189. The cubic root of 82785851 is about 435.8315901921.

The spelling of 82785851 in words is "eighty-two million, seven hundred eighty-five thousand, eight hundred fifty-one".