820650403 has 2 divisors, whose sum is σ = 820650404. Its totient is φ = 820650402.

The previous prime is 820650379. The next prime is 820650431. The reversal of 820650403 is 304056028.

It is an a-pointer prime, because the next prime (820650431) can be obtained adding 820650403 to its sum of digits (28).

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-820650403 is a prime.

It is not a weakly prime, because it can be changed into another prime (820650433) 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 as a sum of consecutive naturals, namely, 410325201 + 410325202.

It is an arithmetic number, because the mean of its divisors is an integer number (410325202).

Almost surely, 2^820650403 is an apocalyptic number.

820650403 is a deficient number, since it is larger than the sum of its proper divisors (1).

820650403 is an equidigital number, since it uses as much as digits as its factorization.

820650403 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5760, while the sum is 28.

The square root of 820650403 is about 28646.9964045098. The cubic root of 820650403 is about 936.2375647233.

The spelling of 820650403 in words is "eight hundred twenty million, six hundred fifty thousand, four hundred three".