25694789 has 2 divisors, whose sum is σ = 25694790. Its totient is φ = 25694788.

The previous prime is 25694743. The next prime is 25694791. The reversal of 25694789 is 98749652.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 24581764 + 1113025 = 4958^2 + 1055^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-25694789 is a prime.

Together with 25694791, it forms a pair of twin primes.

It is a Chen prime.

It is an alternating number because its digits alternate between even and odd.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (25694719) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12847394 + 12847395.

It is an arithmetic number, because the mean of its divisors is an integer number (12847395).

Almost surely, 2^25694789 is an apocalyptic number.

It is an amenable number.

25694789 is a deficient number, since it is larger than the sum of its proper divisors (1).

25694789 is an equidigital number, since it uses as much as digits as its factorization.

25694789 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1088640, while the sum is 50.

The square root of 25694789 is about 5069.0027618852. The cubic root of 25694789 is about 295.0858277510.

The spelling of 25694789 in words is "twenty-five million, six hundred ninety-four thousand, seven hundred eighty-nine".