3857252857 has 2 divisors, whose sum is σ = 3857252858. Its totient is φ = 3857252856.

The previous prime is 3857252843. The next prime is 3857252863. The reversal of 3857252857 is 7582527583.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 3772539241 + 84713616 = 61421^2 + 9204^2 .

It is an emirp because it is prime and its reverse (7582527583) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 3857252857 - 2¹⁵ = 3857220089 is a prime.

It is not a weakly prime, because it can be changed into another prime (3857252827) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1928626428 + 1928626429.

It is an arithmetic number, because the mean of its divisors is an integer number (1928626429).

Almost surely, 2^3857252857 is an apocalyptic number.

It is an amenable number.

3857252857 is a deficient number, since it is larger than the sum of its proper divisors (1).

3857252857 is an equidigital number, since it uses as much as digits as its factorization.

3857252857 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 4704000, while the sum is 52.

The square root of 3857252857 is about 62106.7859174825. The cubic root of 3857252857 is about 1568.2887838456.

The spelling of 3857252857 in words is "three billion, eight hundred fifty-seven million, two hundred fifty-two thousand, eight hundred fifty-seven".