25043609 has 2 divisors, whose sum is σ = 25043610. Its totient is φ = 25043608.

The previous prime is 25043537. The next prime is 25043639. The reversal of 25043609 is 90634052.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 19114384 + 5929225 = 4372^2 + 2435^2 .

It is a cyclic number.

It is not a de Polignac number, because 25043609 - 2¹⁶ = 24978073 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (25043639) 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, 12521804 + 12521805.

It is an arithmetic number, because the mean of its divisors is an integer number (12521805).

Almost surely, 2^25043609 is an apocalyptic number.

It is an amenable number.

25043609 is a deficient number, since it is larger than the sum of its proper divisors (1).

25043609 is an equidigital number, since it uses as much as digits as its factorization.

25043609 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6480, while the sum is 29.

The square root of 25043609 is about 5004.3589999120. The cubic root of 25043609 is about 292.5716930455.

It can be divided in two parts, 25043 and 609, that added together give a palindrome (25652).

The spelling of 25043609 in words is "twenty-five million, forty-three thousand, six hundred nine".