3861817 has 2 divisors, whose sum is σ = 3861818. Its totient is φ = 3861816.

The previous prime is 3861811. The next prime is 3861821. The reversal of 3861817 is 7181683.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 3059001 + 802816 = 1749^2 + 896^2 .

It is a cyclic number.

It is not a de Polignac number, because 3861817 - 2¹¹ = 3859769 is a prime.

It is not a weakly prime, because it can be changed into another prime (3861811) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1930908 + 1930909.

It is an arithmetic number, because the mean of its divisors is an integer number (1930909).

Almost surely, 2^3861817 is an apocalyptic number.

It is an amenable number.

3861817 is a deficient number, since it is larger than the sum of its proper divisors (1).

3861817 is an equidigital number, since it uses as much as digits as its factorization.

3861817 is an evil number, because the sum of its binary digits is even.

The product of its digits is 8064, while the sum is 34.

The square root of 3861817 is about 1965.1506303589. The cubic root of 3861817 is about 156.8907105846.

The spelling of 3861817 in words is "three million, eight hundred sixty-one thousand, eight hundred seventeen".