25690009 has 8 divisors (see below), whose sum is σ = 27246240. Its totient is φ = 24138816.

The previous prime is 25690003. The next prime is 25690039. The reversal of 25690009 is 90009652.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 25690009 - 2⁹ = 25689497 is a prime.

It is not an unprimeable number, because it can be changed into a prime (25690003) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 16582 + ... + 18064.

It is an arithmetic number, because the mean of its divisors is an integer number (3405780).

Almost surely, 2^25690009 is an apocalyptic number.

It is an amenable number.

25690009 is a deficient number, since it is larger than the sum of its proper divisors (1556231).

25690009 is a wasteful number, since it uses less digits than its factorization.

25690009 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2519.

The product of its (nonzero) digits is 4860, while the sum is 31.

The square root of 25690009 is about 5068.5312468209. The cubic root of 25690009 is about 295.0675283502.

The spelling of 25690009 in words is "twenty-five million, six hundred ninety thousand, nine".