3910861 has 2 divisors, whose sum is σ = 3910862. Its totient is φ = 3910860.

The previous prime is 3910849. The next prime is 3910909. The reversal of 3910861 is 1680193.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2205225 + 1705636 = 1485^2 + 1306^2 .

It is a cyclic number.

It is not a de Polignac number, because 3910861 - 2⁷ = 3910733 is a prime.

It is a super-2 number, since 2×3910861² = 30589667522642, which contains 22 as substring.

It is an Ulam number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3910261) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1955430 + 1955431.

It is an arithmetic number, because the mean of its divisors is an integer number (1955431).

Almost surely, 2^3910861 is an apocalyptic number.

It is an amenable number.

3910861 is a deficient number, since it is larger than the sum of its proper divisors (1).

3910861 is an equidigital number, since it uses as much as digits as its factorization.

3910861 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1296, while the sum is 28.

The square root of 3910861 is about 1977.5896945524. The cubic root of 3910861 is about 157.5520748271.

The spelling of 3910861 in words is "three million, nine hundred ten thousand, eight hundred sixty-one".