820625833 has 2 divisors, whose sum is σ = 820625834. Its totient is φ = 820625832.

The previous prime is 820625821. The next prime is 820625873. The reversal of 820625833 is 338526028.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 803552409 + 17073424 = 28347^2 + 4132^2 .

It is a cyclic number.

It is not a de Polignac number, because 820625833 - 2⁵ = 820625801 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 820625792 and 820625801.

It is not a weakly prime, because it can be changed into another prime (820625873) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 410312916 + 410312917.

It is an arithmetic number, because the mean of its divisors is an integer number (410312917).

Almost surely, 2^820625833 is an apocalyptic number.

It is an amenable number.

820625833 is a deficient number, since it is larger than the sum of its proper divisors (1).

820625833 is an equidigital number, since it uses as much as digits as its factorization.

820625833 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 69120, while the sum is 37.

The square root of 820625833 is about 28646.5675605298. The cubic root of 820625833 is about 936.2282210830.

The spelling of 820625833 in words is "eight hundred twenty million, six hundred twenty-five thousand, eight hundred thirty-three".