25393609 has 2 divisors, whose sum is σ = 25393610. Its totient is φ = 25393608.

The previous prime is 25393591. The next prime is 25393657. The reversal of 25393609 is 90639352.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 17665209 + 7728400 = 4203^2 + 2780^2 .

It is a cyclic number.

It is not a de Polignac number, because 25393609 - 2¹³ = 25385417 is a prime.

It is not a weakly prime, because it can be changed into another prime (25303609) 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, 12696804 + 12696805.

It is an arithmetic number, because the mean of its divisors is an integer number (12696805).

Almost surely, 2^25393609 is an apocalyptic number.

It is an amenable number.

25393609 is a deficient number, since it is larger than the sum of its proper divisors (1).

25393609 is an equidigital number, since it uses as much as digits as its factorization.

25393609 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 43740, while the sum is 37.

The square root of 25393609 is about 5039.2071797060. The cubic root of 25393609 is about 293.9283495780.

The spelling of 25393609 in words is "twenty-five million, three hundred ninety-three thousand, six hundred nine".