25209607 has 2 divisors, whose sum is σ = 25209608. Its totient is φ = 25209606.

The previous prime is 25209593. The next prime is 25209619. The reversal of 25209607 is 70690252.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 25209607 - 2¹⁹ = 24685319 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (25209677) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12604803 + 12604804.

It is an arithmetic number, because the mean of its divisors is an integer number (12604804).

Almost surely, 2^25209607 is an apocalyptic number.

25209607 is a deficient number, since it is larger than the sum of its proper divisors (1).

25209607 is an equidigital number, since it uses as much as digits as its factorization.

25209607 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 7560, while the sum is 31.

The square root of 25209607 is about 5020.9169481281. The cubic root of 25209607 is about 293.2166933240.

Adding to 25209607 its reverse (70690252), we get a palindrome (95899859).

The spelling of 25209607 in words is "twenty-five million, two hundred nine thousand, six hundred seven".