25684453 has 2 divisors, whose sum is σ = 25684454. Its totient is φ = 25684452.

The previous prime is 25684441. The next prime is 25684457. The reversal of 25684453 is 35448652.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 18809569 + 6874884 = 4337^2 + 2622^2 .

It is a cyclic number.

It is not a de Polignac number, because 25684453 - 2⁹ = 25683941 is a prime.

It is a super-2 number, since 2×25684453² = 1319382251818418, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (25684457) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12842226 + 12842227.

It is an arithmetic number, because the mean of its divisors is an integer number (12842227).

Almost surely, 2^25684453 is an apocalyptic number.

It is an amenable number.

25684453 is a deficient number, since it is larger than the sum of its proper divisors (1).

25684453 is an equidigital number, since it uses as much as digits as its factorization.

25684453 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 115200, while the sum is 37.

The square root of 25684453 is about 5067.9831294115. The cubic root of 25684453 is about 295.0462553151.

It can be divided in two parts, 2568 and 4453, that added together give a triangular number (7021 = T₁₁₈).

The spelling of 25684453 in words is "twenty-five million, six hundred eighty-four thousand, four hundred fifty-three".