25378289 has 2 divisors, whose sum is σ = 25378290. Its totient is φ = 25378288.

The previous prime is 25378253. The next prime is 25378307. The reversal of 25378289 is 98287352.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 19536400 + 5841889 = 4420^2 + 2417^2 .

It is a cyclic number.

It is not a de Polignac number, because 25378289 - 2⁸ = 25378033 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (25308289) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12689144 + 12689145.

It is an arithmetic number, because the mean of its divisors is an integer number (12689145).

Almost surely, 2^25378289 is an apocalyptic number.

It is an amenable number.

25378289 is a deficient number, since it is larger than the sum of its proper divisors (1).

25378289 is an equidigital number, since it uses as much as digits as its factorization.

25378289 is an evil number, because the sum of its binary digits is even.

The product of its digits is 241920, while the sum is 44.

The square root of 25378289 is about 5037.6868699831. The cubic root of 25378289 is about 293.8692285583.

The spelling of 25378289 in words is "twenty-five million, three hundred seventy-eight thousand, two hundred eighty-nine".