8120806429 has 2 divisors, whose sum is σ = 8120806430. Its totient is φ = 8120806428.

The previous prime is 8120806417. The next prime is 8120806451. The reversal of 8120806429 is 9246080218.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 8113505625 + 7300804 = 90075^2 + 2702^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-8120806429 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 8120806391 and 8120806400.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (8120804429) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4060403214 + 4060403215.

It is an arithmetic number, because the mean of its divisors is an integer number (4060403215).

Almost surely, 2^8120806429 is an apocalyptic number.

It is an amenable number.

8120806429 is a deficient number, since it is larger than the sum of its proper divisors (1).

8120806429 is an equidigital number, since it uses as much as digits as its factorization.

8120806429 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 55296, while the sum is 40.

The square root of 8120806429 is about 90115.5171377272. The cubic root of 8120806429 is about 2010.0169490250.

The spelling of 8120806429 in words is "eight billion, one hundred twenty million, eight hundred six thousand, four hundred twenty-nine".