3623861 has 2 divisors, whose sum is σ = 3623862. Its totient is φ = 3623860.

The previous prime is 3623821. The next prime is 3623881. The reversal of 3623861 is 1683263.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1918225 + 1705636 = 1385^2 + 1306^2 .

It is a cyclic number.

It is not a de Polignac number, because 3623861 - 2¹⁰ = 3622837 is a prime.

It is a Chen prime.

It is equal to p₂₅₈₃₅₆ and since 3623861 and 258356 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3623821) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1811930 + 1811931.

It is an arithmetic number, because the mean of its divisors is an integer number (1811931).

Almost surely, 2^3623861 is an apocalyptic number.

It is an amenable number.

3623861 is a deficient number, since it is larger than the sum of its proper divisors (1).

3623861 is an equidigital number, since it uses as much as digits as its factorization.

3623861 is an evil number, because the sum of its binary digits is even.

The product of its digits is 5184, while the sum is 29.

The square root of 3623861 is about 1903.6441369121. The cubic root of 3623861 is about 153.5997505467.

The spelling of 3623861 in words is "three million, six hundred twenty-three thousand, eight hundred sixty-one".