3825209 has 2 divisors, whose sum is σ = 3825210. Its totient is φ = 3825208.

The previous prime is 3825193. The next prime is 3825223. The reversal of 3825209 is 9025283.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 3097600 + 727609 = 1760^2 + 853^2 .

It is a cyclic number.

It is not a de Polignac number, because 3825209 - 2⁴ = 3825193 is a prime.

It is a Chen prime.

It is an Ulam number.

It is not a weakly prime, because it can be changed into another prime (3825229) 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, 1912604 + 1912605.

It is an arithmetic number, because the mean of its divisors is an integer number (1912605).

Almost surely, 2^3825209 is an apocalyptic number.

It is an amenable number.

3825209 is a deficient number, since it is larger than the sum of its proper divisors (1).

3825209 is an equidigital number, since it uses as much as digits as its factorization.

3825209 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4320, while the sum is 29.

The square root of 3825209 is about 1955.8141527252. The cubic root of 3825209 is about 156.3933885872.

The spelling of 3825209 in words is "three million, eight hundred twenty-five thousand, two hundred nine".