25543879 has 2 divisors, whose sum is σ = 25543880. Its totient is φ = 25543878.

The previous prime is 25543853. The next prime is 25543909. The reversal of 25543879 is 97834552.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 25543879 - 2²¹ = 23446727 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (25583879) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12771939 + 12771940.

It is an arithmetic number, because the mean of its divisors is an integer number (12771940).

Almost surely, 2^25543879 is an apocalyptic number.

25543879 is a deficient number, since it is larger than the sum of its proper divisors (1).

25543879 is an equidigital number, since it uses as much as digits as its factorization.

25543879 is an evil number, because the sum of its binary digits is even.

The product of its digits is 302400, while the sum is 43.

The square root of 25543879 is about 5054.0952701745. The cubic root of 25543879 is about 294.5069961432.

The spelling of 25543879 in words is "twenty-five million, five hundred forty-three thousand, eight hundred seventy-nine".