25683813 has 6 divisors (see below), whose sum is σ = 37098854. Its totient is φ = 17122536.

The previous prime is 25683803. The next prime is 25683817. The reversal of 25683813 is 31838652.

It can be written as a sum of positive squares in only one way, i.e., 21095649 + 4588164 = 4593^2 + 2142^2 .

It is not a de Polignac number, because 25683813 - 2⁴ = 25683797 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 (25683817) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1426870 + ... + 1426887.

Almost surely, 2^25683813 is an apocalyptic number.

It is an amenable number.

25683813 is a deficient number, since it is larger than the sum of its proper divisors (11415041).

25683813 is a wasteful number, since it uses less digits than its factorization.

25683813 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2853763 (or 2853760 counting only the distinct ones).

The product of its digits is 34560, while the sum is 36.

The square root of 25683813 is about 5067.9199875294. The cubic root of 25683813 is about 295.0438046605.

The spelling of 25683813 in words is "twenty-five million, six hundred eighty-three thousand, eight hundred thirteen".