25454789 has 2 divisors, whose sum is σ = 25454790. Its totient is φ = 25454788.

The previous prime is 25454773. The next prime is 25454791. The reversal of 25454789 is 98745452.

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., 22420225 + 3034564 = 4735^2 + 1742^2 .

It is a cyclic number.

It is not a de Polignac number, because 25454789 - 2⁴ = 25454773 is a prime.

Together with 25454791, 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 (25454749) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12727394 + 12727395.

It is an arithmetic number, because the mean of its divisors is an integer number (12727395).

Almost surely, 2^25454789 is an apocalyptic number.

It is an amenable number.

25454789 is a deficient number, since it is larger than the sum of its proper divisors (1).

25454789 is an equidigital number, since it uses as much as digits as its factorization.

25454789 is an evil number, because the sum of its binary digits is even.

The product of its digits is 403200, while the sum is 44.

The square root of 25454789 is about 5045.2739271520. The cubic root of 25454789 is about 294.1642109470.

The spelling of 25454789 in words is "twenty-five million, four hundred fifty-four thousand, seven hundred eighty-nine".