25990543 has 2 divisors, whose sum is σ = 25990544. Its totient is φ = 25990542.

The previous prime is 25990519. The next prime is 25990553. The reversal of 25990543 is 34509952.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-25990543 is a prime.

It is equal to p_1623979 and since 25990543 and 1623979 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (25990553) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12995271 + 12995272.

It is an arithmetic number, because the mean of its divisors is an integer number (12995272).

Almost surely, 2^25990543 is an apocalyptic number.

25990543 is a deficient number, since it is larger than the sum of its proper divisors (1).

25990543 is an equidigital number, since it uses as much as digits as its factorization.

25990543 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 48600, while the sum is 37.

The square root of 25990543 is about 5098.0920941074. The cubic root of 25990543 is about 296.2136841192.

The spelling of 25990543 in words is "twenty-five million, nine hundred ninety thousand, five hundred forty-three".