3851705813 has 2 divisors, whose sum is σ = 3851705814. Its totient is φ = 3851705812.

The previous prime is 3851705773. The next prime is 3851705843. The reversal of 3851705813 is 3185071583.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 3602760529 + 248945284 = 60023^2 + 15778^2 .

It is a cyclic number.

It is not a de Polignac number, because 3851705813 - 2⁶ = 3851705749 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3851705843) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1925852906 + 1925852907.

It is an arithmetic number, because the mean of its divisors is an integer number (1925852907).

Almost surely, 2^3851705813 is an apocalyptic number.

It is an amenable number.

3851705813 is a deficient number, since it is larger than the sum of its proper divisors (1).

3851705813 is an equidigital number, since it uses as much as digits as its factorization.

3851705813 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 100800, while the sum is 41.

The square root of 3851705813 is about 62062.1125405831. The cubic root of 3851705813 is about 1567.5366474868.

The spelling of 3851705813 in words is "three billion, eight hundred fifty-one million, seven hundred five thousand, eight hundred thirteen".