3855212729 has 2 divisors, whose sum is σ = 3855212730. Its totient is φ = 3855212728.

The previous prime is 3855212671. The next prime is 3855212747. The reversal of 3855212729 is 9272125583.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 3746052025 + 109160704 = 61205^2 + 10448^2 .

It is a cyclic number.

It is not a de Polignac number, because 3855212729 - 2¹⁶ = 3855147193 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 3855212729.

It is not a weakly prime, because it can be changed into another prime (3855211729) 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, 1927606364 + 1927606365.

It is an arithmetic number, because the mean of its divisors is an integer number (1927606365).

Almost surely, 2^3855212729 is an apocalyptic number.

It is an amenable number.

3855212729 is a deficient number, since it is larger than the sum of its proper divisors (1).

3855212729 is an equidigital number, since it uses as much as digits as its factorization.

3855212729 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 302400, while the sum is 44.

The square root of 3855212729 is about 62090.3593885556. The cubic root of 3855212729 is about 1568.0122421180.

The spelling of 3855212729 in words is "three billion, eight hundred fifty-five million, two hundred twelve thousand, seven hundred twenty-nine".