25706489 has 2 divisors, whose sum is σ = 25706490. Its totient is φ = 25706488.

The previous prime is 25706423. The next prime is 25706501. The reversal of 25706489 is 98460752.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 13630864 + 12075625 = 3692^2 + 3475^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-25706489 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (25700489) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12853244 + 12853245.

It is an arithmetic number, because the mean of its divisors is an integer number (12853245).

Almost surely, 2^25706489 is an apocalyptic number.

It is an amenable number.

25706489 is a deficient number, since it is larger than the sum of its proper divisors (1).

25706489 is an equidigital number, since it uses as much as digits as its factorization.

25706489 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 120960, while the sum is 41.

The square root of 25706489 is about 5070.1567036927. The cubic root of 25706489 is about 295.1306095975.

The spelling of 25706489 in words is "twenty-five million, seven hundred six thousand, four hundred eighty-nine".