25286693 has 2 divisors, whose sum is σ = 25286694. Its totient is φ = 25286692.

The previous prime is 25286617. The next prime is 25286699. The reversal of 25286693 is 39668252.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 20367169 + 4919524 = 4513^2 + 2218^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-25286693 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 25286693.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (25286699) by changing a digit.

It is a good prime.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12643346 + 12643347.

It is an arithmetic number, because the mean of its divisors is an integer number (12643347).

Almost surely, 2^25286693 is an apocalyptic number.

It is an amenable number.

25286693 is a deficient number, since it is larger than the sum of its proper divisors (1).

25286693 is an equidigital number, since it uses as much as digits as its factorization.

25286693 is an evil number, because the sum of its binary digits is even.

The product of its digits is 155520, while the sum is 41.

The square root of 25286693 is about 5028.5875750552. The cubic root of 25286693 is about 293.5152554644.

The spelling of 25286693 in words is "twenty-five million, two hundred eighty-six thousand, six hundred ninety-three".