25628789 has 2 divisors, whose sum is σ = 25628790. Its totient is φ = 25628788.

The previous prime is 25628761. The next prime is 25628791. The reversal of 25628789 is 98782652.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 25421764 + 207025 = 5042^2 + 455^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-25628789 is a prime.

Together with 25628791, 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 (25628719) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12814394 + 12814395.

It is an arithmetic number, because the mean of its divisors is an integer number (12814395).

Almost surely, 2^25628789 is an apocalyptic number.

It is an amenable number.

25628789 is a deficient number, since it is larger than the sum of its proper divisors (1).

25628789 is an equidigital number, since it uses as much as digits as its factorization.

25628789 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 483840, while the sum is 47.

The square root of 25628789 is about 5062.4884197398. The cubic root of 25628789 is about 294.8329572355.

The spelling of 25628789 in words is "twenty-five million, six hundred twenty-eight thousand, seven hundred eighty-nine".