3904591 has 2 divisors, whose sum is σ = 3904592. Its totient is φ = 3904590.

The previous prime is 3904547. The next prime is 3904597. The reversal of 3904591 is 1954093.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 3904591 - 2¹⁵ = 3871823 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3904597) 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, 1952295 + 1952296.

It is an arithmetic number, because the mean of its divisors is an integer number (1952296).

Almost surely, 2^3904591 is an apocalyptic number.

3904591 is a deficient number, since it is larger than the sum of its proper divisors (1).

3904591 is an equidigital number, since it uses as much as digits as its factorization.

3904591 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4860, while the sum is 31.

The square root of 3904591 is about 1976.0037955429. The cubic root of 3904591 is about 157.4678325169.

The spelling of 3904591 in words is "three million, nine hundred four thousand, five hundred ninety-one".