25694009 has 16 divisors (see below), whose sum is σ = 29184000. Its totient is φ = 22410000.

The previous prime is 25693999. The next prime is 25694041. The reversal of 25694009 is 90049652.

It is a cyclic number.

It is not a de Polignac number, because 25694009 - 2¹² = 25689913 is a prime.

It is a Smith number, since the sum of its digits (35) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 25694009.

It is not an unprimeable number, because it can be changed into a prime (25694069) 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 15 ways as a sum of consecutive naturals, for example, 51242 + ... + 51740.

It is an arithmetic number, because the mean of its divisors is an integer number (1824000).

Almost surely, 2^25694009 is an apocalyptic number.

It is an amenable number.

25694009 is a deficient number, since it is larger than the sum of its proper divisors (3489991).

25694009 is a wasteful number, since it uses less digits than its factorization.

25694009 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 692.

The product of its (nonzero) digits is 19440, while the sum is 35.

The square root of 25694009 is about 5068.9258230911. The cubic root of 25694009 is about 295.0828418113.

The spelling of 25694009 in words is "twenty-five million, six hundred ninety-four thousand, nine".