25385447 has 2 divisors, whose sum is σ = 25385448. Its totient is φ = 25385446.

The previous prime is 25385443. The next prime is 25385449. The reversal of 25385447 is 74458352.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 25385447 - 2² = 25385443 is a prime.

Together with 25385449, it forms a pair of twin primes.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 25385447.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (25385443) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12692723 + 12692724.

It is an arithmetic number, because the mean of its divisors is an integer number (12692724).

Almost surely, 2^25385447 is an apocalyptic number.

25385447 is a deficient number, since it is larger than the sum of its proper divisors (1).

25385447 is an equidigital number, since it uses as much as digits as its factorization.

25385447 is an evil number, because the sum of its binary digits is even.

The product of its digits is 134400, while the sum is 38.

The square root of 25385447 is about 5038.3972650040. The cubic root of 25385447 is about 293.8968547733.

The spelling of 25385447 in words is "twenty-five million, three hundred eighty-five thousand, four hundred forty-seven".