25568993 has 2 divisors, whose sum is σ = 25568994. Its totient is φ = 25568992.

The previous prime is 25568951. The next prime is 25569013. The reversal of 25568993 is 39986552.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 17372224 + 8196769 = 4168^2 + 2863^2 .

It is a cyclic number.

It is not a de Polignac number, because 25568993 - 2⁶ = 25568929 is a prime.

It is not a weakly prime, because it can be changed into another prime (25568093) 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 as a sum of consecutive naturals, namely, 12784496 + 12784497.

It is an arithmetic number, because the mean of its divisors is an integer number (12784497).

Almost surely, 2^25568993 is an apocalyptic number.

It is an amenable number.

25568993 is a deficient number, since it is larger than the sum of its proper divisors (1).

25568993 is an equidigital number, since it uses as much as digits as its factorization.

25568993 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 583200, while the sum is 47.

The square root of 25568993 is about 5056.5791796431. The cubic root of 25568993 is about 294.6034814382.

The spelling of 25568993 in words is "twenty-five million, five hundred sixty-eight thousand, nine hundred ninety-three".