82156783 has 4 divisors (see below), whose sum is σ = 82180440. Its totient is φ = 82133128.

The previous prime is 82156777. The next prime is 82156829. The reversal of 82156783 is 38765128.

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 82156783 - 2⁵ = 82156751 is a prime.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (82156183) 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, 5485 + ... + 13942.

It is an arithmetic number, because the mean of its divisors is an integer number (20545110).

Almost surely, 2^82156783 is an apocalyptic number.

82156783 is a deficient number, since it is larger than the sum of its proper divisors (23657).

82156783 is a wasteful number, since it uses less digits than its factorization.

82156783 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23656.

The product of its digits is 80640, while the sum is 40.

The square root of 82156783 is about 9064.0378970964. The cubic root of 82156783 is about 434.7248588168.

The spelling of 82156783 in words is "eighty-two million, one hundred fifty-six thousand, seven hundred eighty-three".