25963543 has 4 divisors (see below), whose sum is σ = 25975728. Its totient is φ = 25951360.

The previous prime is 25963507. The next prime is 25963549. The reversal of 25963543 is 34536952.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 25963543 - 2⁹ = 25963031 is a prime.

It is a super-2 number, since 2×25963543² = 1348211130225698, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25963549) 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 in 3 ways as a sum of consecutive naturals, for example, 1963 + ... + 7468.

It is an arithmetic number, because the mean of its divisors is an integer number (6493932).

Almost surely, 2^25963543 is an apocalyptic number.

25963543 is a deficient number, since it is larger than the sum of its proper divisors (12185).

25963543 is an equidigital number, since it uses as much as digits as its factorization.

25963543 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12184.

The product of its digits is 97200, while the sum is 37.

The square root of 25963543 is about 5095.4433565687. The cubic root of 25963543 is about 296.1110757649. Note that the first 3 decimals are identical.

The spelling of 25963543 in words is "twenty-five million, nine hundred sixty-three thousand, five hundred forty-three".