3958109 has 2 divisors, whose sum is σ = 3958110. Its totient is φ = 3958108.

The previous prime is 3958103. The next prime is 3958147. The reversal of 3958109 is 9018593.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2059225 + 1898884 = 1435^2 + 1378^2 .

It is a cyclic number.

It is not a de Polignac number, because 3958109 - 2¹⁶ = 3892573 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3958103) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1979054 + 1979055.

It is an arithmetic number, because the mean of its divisors is an integer number (1979055).

Almost surely, 2^3958109 is an apocalyptic number.

It is an amenable number.

3958109 is a deficient number, since it is larger than the sum of its proper divisors (1).

3958109 is an equidigital number, since it uses as much as digits as its factorization.

3958109 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 9720, while the sum is 35.

The square root of 3958109 is about 1989.4996858507. The cubic root of 3958109 is about 158.1840108974.

The spelling of 3958109 in words is "three million, nine hundred fifty-eight thousand, one hundred nine".