25955869 has 2 divisors, whose sum is σ = 25955870. Its totient is φ = 25955868.

The previous prime is 25955863. The next prime is 25955873. The reversal of 25955869 is 96855952.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 20839225 + 5116644 = 4565^2 + 2262^2 .

It is a cyclic number.

It is not a de Polignac number, because 25955869 - 2¹⁷ = 25824797 is a prime.

It is a super-2 number, since 2×25955869² = 1347414271090322, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (25955863) 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, 12977934 + 12977935.

It is an arithmetic number, because the mean of its divisors is an integer number (12977935).

Almost surely, 2^25955869 is an apocalyptic number.

It is an amenable number.

25955869 is a deficient number, since it is larger than the sum of its proper divisors (1).

25955869 is an equidigital number, since it uses as much as digits as its factorization.

25955869 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 972000, while the sum is 49.

The square root of 25955869 is about 5094.6902751787. The cubic root of 25955869 is about 296.0818992087.

It can be divided in two parts, 2595 and 5869, that added together give a square (8464 = 92²).

The spelling of 25955869 in words is "twenty-five million, nine hundred fifty-five thousand, eight hundred sixty-nine".