25906973 has 2 divisors, whose sum is σ = 25906974. Its totient is φ = 25906972.

The previous prime is 25906961. The next prime is 25906987. The reversal of 25906973 is 37960952.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 25775929 + 131044 = 5077^2 + 362^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-25906973 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 25906973.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (25906913) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12953486 + 12953487.

It is an arithmetic number, because the mean of its divisors is an integer number (12953487).

Almost surely, 2^25906973 is an apocalyptic number.

It is an amenable number.

25906973 is a deficient number, since it is larger than the sum of its proper divisors (1).

25906973 is an equidigital number, since it uses as much as digits as its factorization.

25906973 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 102060, while the sum is 41.

The square root of 25906973 is about 5089.8892915269. The cubic root of 25906973 is about 295.8958613758.

The spelling of 25906973 in words is "twenty-five million, nine hundred six thousand, nine hundred seventy-three".