25303609 has 2 divisors, whose sum is σ = 25303610. Its totient is φ = 25303608.

The previous prime is 25303591. The next prime is 25303613. The reversal of 25303609 is 90630352.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 16321600 + 8982009 = 4040^2 + 2997^2 .

It is a cyclic number.

It is not a de Polignac number, because 25303609 - 2²¹ = 23206457 is a prime.

It is not a weakly prime, because it can be changed into another prime (25303639) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12651804 + 12651805.

It is an arithmetic number, because the mean of its divisors is an integer number (12651805).

Almost surely, 2^25303609 is an apocalyptic number.

It is an amenable number.

25303609 is a deficient number, since it is larger than the sum of its proper divisors (1).

25303609 is an equidigital number, since it uses as much as digits as its factorization.

25303609 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4860, while the sum is 28.

The square root of 25303609 is about 5030.2692770865. The cubic root of 25303609 is about 293.5806916908.

The spelling of 25303609 in words is "twenty-five million, three hundred three thousand, six hundred nine".