25780847 has 2 divisors, whose sum is σ = 25780848. Its totient is φ = 25780846.

The previous prime is 25780831. The next prime is 25780849. The reversal of 25780847 is 74808752.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 25780847 - 2⁴ = 25780831 is a prime.

Together with 25780849, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (25780849) 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, 12890423 + 12890424.

It is an arithmetic number, because the mean of its divisors is an integer number (12890424).

Almost surely, 2^25780847 is an apocalyptic number.

25780847 is a deficient number, since it is larger than the sum of its proper divisors (1).

25780847 is an equidigital number, since it uses as much as digits as its factorization.

25780847 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 125440, while the sum is 41.

The square root of 25780847 is about 5077.4843180457. The cubic root of 25780847 is about 295.4148983400.

The spelling of 25780847 in words is "twenty-five million, seven hundred eighty thousand, eight hundred forty-seven".