25484209 has 2 divisors, whose sum is σ = 25484210. Its totient is φ = 25484208.

The previous prime is 25484191. The next prime is 25484213. The reversal of 25484209 is 90248452.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 24285184 + 1199025 = 4928^2 + 1095^2 .

It is a cyclic number.

It is not a de Polignac number, because 25484209 - 2⁵ = 25484177 is a prime.

It is not a weakly prime, because it can be changed into another prime (25484269) 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, 12742104 + 12742105.

It is an arithmetic number, because the mean of its divisors is an integer number (12742105).

Almost surely, 2^25484209 is an apocalyptic number.

It is an amenable number.

25484209 is a deficient number, since it is larger than the sum of its proper divisors (1).

25484209 is an equidigital number, since it uses as much as digits as its factorization.

25484209 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 23040, while the sum is 34.

The square root of 25484209 is about 5048.1886850632. The cubic root of 25484209 is about 294.2774964939.

The spelling of 25484209 in words is "twenty-five million, four hundred eighty-four thousand, two hundred nine".