25027813 has 2 divisors, whose sum is σ = 25027814. Its totient is φ = 25027812.

The previous prime is 25027811. The next prime is 25027823. The reversal of 25027813 is 31872052.

25027813 = 3537² + 3538².

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 12517444 + 12510369 = 3538^2 + 3537^2 .

It is a cyclic number.

It is not a de Polignac number, because 25027813 - 2¹ = 25027811 is a prime.

Together with 25027811, 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 (25027811) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12513906 + 12513907.

It is an arithmetic number, because the mean of its divisors is an integer number (12513907).

Almost surely, 2^25027813 is an apocalyptic number.

25027813 is the 3538-th centered square number.

It is an amenable number.

25027813 is a deficient number, since it is larger than the sum of its proper divisors (1).

25027813 is an equidigital number, since it uses as much as digits as its factorization.

25027813 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3360, while the sum is 28.

The square root of 25027813 is about 5002.7805268670. The cubic root of 25027813 is about 292.5101679082.

Adding to 25027813 its reverse (31872052), we get a palindrome (56899865).

The spelling of 25027813 in words is "twenty-five million, twenty-seven thousand, eight hundred thirteen".