25663073 has 2 divisors, whose sum is σ = 25663074. Its totient is φ = 25663072.

The previous prime is 25663037. The next prime is 25663093. The reversal of 25663073 is 37036652.

Together with previous prime (25663037) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 13601344 + 12061729 = 3688^2 + 3473^2 .

It is a cyclic number.

It is not a de Polignac number, because 25663073 - 2²⁴ = 8885857 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (25663003) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12831536 + 12831537.

It is an arithmetic number, because the mean of its divisors is an integer number (12831537).

Almost surely, 2^25663073 is an apocalyptic number.

It is an amenable number.

25663073 is a deficient number, since it is larger than the sum of its proper divisors (1).

25663073 is an equidigital number, since it uses as much as digits as its factorization.

25663073 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 22680, while the sum is 32.

The square root of 25663073 is about 5065.8733699136. The cubic root of 25663073 is about 294.9643660875.

The spelling of 25663073 in words is "twenty-five million, six hundred sixty-three thousand, seventy-three".