25982109 has 6 divisors (see below), whose sum is σ = 37529726. Its totient is φ = 17321400.

The previous prime is 25982107. The next prime is 25982113. The reversal of 25982109 is 90128952.

It can be written as a sum of positive squares in only one way, i.e., 22752900 + 3229209 = 4770^2 + 1797^2 .

It is not a de Polignac number, because 25982109 - 2¹ = 25982107 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 (25982107) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1443442 + ... + 1443459.

Almost surely, 2^25982109 is an apocalyptic number.

It is an amenable number.

25982109 is a deficient number, since it is larger than the sum of its proper divisors (11547617).

25982109 is a wasteful number, since it uses less digits than its factorization.

25982109 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2886907 (or 2886904 counting only the distinct ones).

The product of its (nonzero) digits is 12960, while the sum is 36.

The square root of 25982109 is about 5097.2648548020. The cubic root of 25982109 is about 296.1816399446.

The spelling of 25982109 in words is "twenty-five million, nine hundred eighty-two thousand, one hundred nine".