25316909 has 4 divisors (see below), whose sum is σ = 25622016. Its totient is φ = 25011804.

The previous prime is 25316899. The next prime is 25316939. The reversal of 25316909 is 90961352.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-25316909 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25316939) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 152429 + ... + 152594.

It is an arithmetic number, because the mean of its divisors is an integer number (6405504).

Almost surely, 2^25316909 is an apocalyptic number.

It is an amenable number.

25316909 is a deficient number, since it is larger than the sum of its proper divisors (305107).

25316909 is an equidigital number, since it uses as much as digits as its factorization.

25316909 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 305106.

The product of its (nonzero) digits is 14580, while the sum is 35.

The square root of 25316909 is about 5031.5911002386. The cubic root of 25316909 is about 293.6321196549.

The spelling of 25316909 in words is "twenty-five million, three hundred sixteen thousand, nine hundred nine".