25917943 has 2 divisors, whose sum is σ = 25917944. Its totient is φ = 25917942.

The previous prime is 25917937. The next prime is 25917961. The reversal of 25917943 is 34971952.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 25917943 - 2⁹ = 25917431 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 25917896 and 25917905.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (25917443) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12958971 + 12958972.

It is an arithmetic number, because the mean of its divisors is an integer number (12958972).

Almost surely, 2^25917943 is an apocalyptic number.

25917943 is a deficient number, since it is larger than the sum of its proper divisors (1).

25917943 is an equidigital number, since it uses as much as digits as its factorization.

25917943 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 68040, while the sum is 40.

The square root of 25917943 is about 5090.9668040560. The cubic root of 25917943 is about 295.9376200116.

The spelling of 25917943 in words is "twenty-five million, nine hundred seventeen thousand, nine hundred forty-three".