820908083 has 4 divisors (see below), whose sum is σ = 821326128. Its totient is φ = 820490040.

The previous prime is 820908079. The next prime is 820908113. The reversal of 820908083 is 380809028.

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 820908083 - 2² = 820908079 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (820908383) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 206063 + ... + 210008.

It is an arithmetic number, because the mean of its divisors is an integer number (205331532).

Almost surely, 2^820908083 is an apocalyptic number.

820908083 is a deficient number, since it is larger than the sum of its proper divisors (418045).

820908083 is a wasteful number, since it uses less digits than its factorization.

820908083 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 418044.

The product of its (nonzero) digits is 27648, while the sum is 38.

The square root of 820908083 is about 28651.4935561831. The cubic root of 820908083 is about 936.3355457267.

The spelling of 820908083 in words is "eight hundred twenty million, nine hundred eight thousand, eighty-three".