25097543 has 2 divisors, whose sum is σ = 25097544. Its totient is φ = 25097542.

The previous prime is 25097533. The next prime is 25097563. The reversal of 25097543 is 34579052.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 25097543 - 2²⁰ = 24048967 is a prime.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (25097533) 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, 12548771 + 12548772.

It is an arithmetic number, because the mean of its divisors is an integer number (12548772).

Almost surely, 2^25097543 is an apocalyptic number.

25097543 is a deficient number, since it is larger than the sum of its proper divisors (1).

25097543 is an equidigital number, since it uses as much as digits as its factorization.

25097543 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 37800, while the sum is 35.

The square root of 25097543 is about 5009.7448038797. The cubic root of 25097543 is about 292.7815702453.

The spelling of 25097543 in words is "twenty-five million, ninety-seven thousand, five hundred forty-three".