3857385712429 has 2 divisors, whose sum is σ = 3857385712430. Its totient is φ = 3857385712428.

The previous prime is 3857385712387. The next prime is 3857385712507. The reversal of 3857385712429 is 9242175837583.

3857385712429 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 3835154306025 + 22231406404 = 1958355^2 + 149102^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-3857385712429 is a prime.

It is a super-3 number, since 3×3857385712429³ (a number of 39 digits) contains 333 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3857385712729) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1928692856214 + 1928692856215.

It is an arithmetic number, because the mean of its divisors is an integer number (1928692856215).

Almost surely, 2^{3857385712429} is an apocalyptic number.

It is an amenable number.

3857385712429 is a deficient number, since it is larger than the sum of its proper divisors (1).

3857385712429 is an equidigital number, since it uses as much as digits as its factorization.

3857385712429 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 101606400, while the sum is 64.

The spelling of 3857385712429 in words is "three trillion, eight hundred fifty-seven billion, three hundred eighty-five million, seven hundred twelve thousand, four hundred twenty-nine".