3925091 has 2 divisors, whose sum is σ = 3925092. Its totient is φ = 3925090.

The previous prime is 3925087. The next prime is 3925109. The reversal of 3925091 is 1905293.

Together with next prime (3925109) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 3925091 - 2² = 3925087 is a prime.

It is not a weakly prime, because it can be changed into another prime (3925391) 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, 1962545 + 1962546.

It is an arithmetic number, because the mean of its divisors is an integer number (1962546).

Almost surely, 2^3925091 is an apocalyptic number.

3925091 is a deficient number, since it is larger than the sum of its proper divisors (1).

3925091 is an equidigital number, since it uses as much as digits as its factorization.

3925091 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2430, while the sum is 29.

The square root of 3925091 is about 1981.1842418109. The cubic root of 3925091 is about 157.7429323999.

The spelling of 3925091 in words is "three million, nine hundred twenty-five thousand, ninety-one".