25216693 has 2 divisors, whose sum is σ = 25216694. Its totient is φ = 25216692.

The previous prime is 25216691. The next prime is 25216727. The reversal of 25216693 is 39661252.

It is an a-pointer prime, because the next prime (25216727) can be obtained adding 25216693 to its sum of digits (34).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 24373969 + 842724 = 4937^2 + 918^2 .

It is a cyclic number.

It is not a de Polignac number, because 25216693 - 2¹ = 25216691 is a prime.

Together with 25216691, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (25216691) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12608346 + 12608347.

It is an arithmetic number, because the mean of its divisors is an integer number (12608347).

Almost surely, 2^25216693 is an apocalyptic number.

It is an amenable number.

25216693 is a deficient number, since it is larger than the sum of its proper divisors (1).

25216693 is an equidigital number, since it uses as much as digits as its factorization.

25216693 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 19440, while the sum is 34.

The square root of 25216693 is about 5021.6225465481. The cubic root of 25216693 is about 293.2441635241.

The spelling of 25216693 in words is "twenty-five million, two hundred sixteen thousand, six hundred ninety-three".