25684553 has 2 divisors, whose sum is σ = 25684554. Its totient is φ = 25684552.

The previous prime is 25684507. The next prime is 25684577. The reversal of 25684553 is 35548652.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 22629049 + 3055504 = 4757^2 + 1748^2 .

It is a cyclic number.

It is not a de Polignac number, because 25684553 - 2¹⁰ = 25683529 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (25684453) 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 as a sum of consecutive naturals, namely, 12842276 + 12842277.

It is an arithmetic number, because the mean of its divisors is an integer number (12842277).

Almost surely, 2^25684553 is an apocalyptic number.

It is an amenable number.

25684553 is a deficient number, since it is larger than the sum of its proper divisors (1).

25684553 is an equidigital number, since it uses as much as digits as its factorization.

25684553 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 144000, while the sum is 38.

The square root of 25684553 is about 5067.9929952596. The cubic root of 25684553 is about 295.0466382262.

The spelling of 25684553 in words is "twenty-five million, six hundred eighty-four thousand, five hundred fifty-three".