4129808857 has 2 divisors, whose sum is σ = 4129808858. Its totient is φ = 4129808856.

The previous prime is 4129808843. The next prime is 4129808863. The reversal of 4129808857 is 7588089214.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2955444496 + 1174364361 = 54364^2 + 34269^2 .

It is a cyclic number.

It is not a de Polignac number, because 4129808857 - 2¹⁵ = 4129776089 is a prime.

It is not a weakly prime, because it can be changed into another prime (4129808807) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2064904428 + 2064904429.

It is an arithmetic number, because the mean of its divisors is an integer number (2064904429).

Almost surely, 2^4129808857 is an apocalyptic number.

It is an amenable number.

4129808857 is a deficient number, since it is larger than the sum of its proper divisors (1).

4129808857 is an equidigital number, since it uses as much as digits as its factorization.

4129808857 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1290240, while the sum is 52.

The square root of 4129808857 is about 64263.5888898216. The cubic root of 4129808857 is about 1604.3901380844.

The spelling of 4129808857 in words is "four billion, one hundred twenty-nine million, eight hundred eight thousand, eight hundred fifty-seven".