25350509 has 2 divisors, whose sum is σ = 25350510. Its totient is φ = 25350508.

The previous prime is 25350497. The next prime is 25350527. The reversal of 25350509 is 90505352.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 24780484 + 570025 = 4978^2 + 755^2 .

It is a cyclic number.

It is not a de Polignac number, because 25350509 - 2⁸ = 25350253 is a prime.

It is a Chen prime.

It is equal to p_1586414 and since 25350509 and 1586414 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (25350539) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12675254 + 12675255.

It is an arithmetic number, because the mean of its divisors is an integer number (12675255).

Almost surely, 2^25350509 is an apocalyptic number.

It is an amenable number.

25350509 is a deficient number, since it is larger than the sum of its proper divisors (1).

25350509 is an equidigital number, since it uses as much as digits as its factorization.

25350509 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6750, while the sum is 29.

The square root of 25350509 is about 5034.9288972139. The cubic root of 25350509 is about 293.7619627541.

The spelling of 25350509 in words is "twenty-five million, three hundred fifty thousand, five hundred nine".