3955909 has 2 divisors, whose sum is σ = 3955910. Its totient is φ = 3955908.

The previous prime is 3955877. The next prime is 3955927. The reversal of 3955909 is 9095593.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 3526884 + 429025 = 1878^2 + 655^2 .

It is a cyclic number.

It is not a de Polignac number, because 3955909 - 2⁵ = 3955877 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3955949) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1977954 + 1977955.

It is an arithmetic number, because the mean of its divisors is an integer number (1977955).

Almost surely, 2^3955909 is an apocalyptic number.

It is an amenable number.

3955909 is a deficient number, since it is larger than the sum of its proper divisors (1).

3955909 is an equidigital number, since it uses as much as digits as its factorization.

3955909 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 54675, while the sum is 40.

The square root of 3955909 is about 1988.9467061739. The cubic root of 3955909 is about 158.1546981355.

The spelling of 3955909 in words is "three million, nine hundred fifty-five thousand, nine hundred nine".