25775749 has 2 divisors, whose sum is σ = 25775750. Its totient is φ = 25775748.

The previous prime is 25775747. The next prime is 25775753. The reversal of 25775749 is 94757752.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 25573249 + 202500 = 5057^2 + 450^2 .

It is a cyclic number.

It is not a de Polignac number, because 25775749 - 2¹ = 25775747 is a prime.

It is a super-2 number, since 2×25775749² = 1328778473022002, which contains 22 as substring.

Together with 25775747, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 25775699 and 25775708.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (25775747) 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, 12887874 + 12887875.

It is an arithmetic number, because the mean of its divisors is an integer number (12887875).

Almost surely, 2^25775749 is an apocalyptic number.

It is an amenable number.

25775749 is a deficient number, since it is larger than the sum of its proper divisors (1).

25775749 is an equidigital number, since it uses as much as digits as its factorization.

25775749 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 617400, while the sum is 46.

The square root of 25775749 is about 5076.9822729649. The cubic root of 25775749 is about 295.3954249117.

The spelling of 25775749 in words is "twenty-five million, seven hundred seventy-five thousand, seven hundred forty-nine".