25930309 has 2 divisors, whose sum is σ = 25930310. Its totient is φ = 25930308.

The previous prime is 25930243. The next prime is 25930313. The reversal of 25930309 is 90303952.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 15626209 + 10304100 = 3953^2 + 3210^2 .

It is a cyclic number.

It is not a de Polignac number, because 25930309 - 2⁷ = 25930181 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (25930319) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12965154 + 12965155.

It is an arithmetic number, because the mean of its divisors is an integer number (12965155).

Almost surely, 2^25930309 is an apocalyptic number.

It is an amenable number.

25930309 is a deficient number, since it is larger than the sum of its proper divisors (1).

25930309 is an equidigital number, since it uses as much as digits as its factorization.

25930309 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 7290, while the sum is 31.

The square root of 25930309 is about 5092.1811633130. The cubic root of 25930309 is about 295.9846785654.

The spelling of 25930309 in words is "twenty-five million, nine hundred thirty thousand, three hundred nine".