3908491 has 2 divisors, whose sum is σ = 3908492. Its totient is φ = 3908490.

The previous prime is 3908477. The next prime is 3908497. The reversal of 3908491 is 1948093.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 3908491 - 2⁷ = 3908363 is a prime.

It is not a weakly prime, because it can be changed into another prime (3908497) 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, 1954245 + 1954246.

It is an arithmetic number, because the mean of its divisors is an integer number (1954246).

Almost surely, 2^3908491 is an apocalyptic number.

3908491 is a deficient number, since it is larger than the sum of its proper divisors (1).

3908491 is an equidigital number, since it uses as much as digits as its factorization.

3908491 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 7776, while the sum is 34.

The square root of 3908491 is about 1976.9903894556. The cubic root of 3908491 is about 157.5202426321.

The spelling of 3908491 in words is "three million, nine hundred eight thousand, four hundred ninety-one".