25352009 has 2 divisors, whose sum is σ = 25352010. Its totient is φ = 25352008.

The previous prime is 25351999. The next prime is 25352021. The reversal of 25352009 is 90025352.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 25351225 + 784 = 5035^2 + 28^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-25352009 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (25352039) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12676004 + 12676005.

It is an arithmetic number, because the mean of its divisors is an integer number (12676005).

Almost surely, 2^25352009 is an apocalyptic number.

It is an amenable number.

25352009 is a deficient number, since it is larger than the sum of its proper divisors (1).

25352009 is an equidigital number, since it uses as much as digits as its factorization.

25352009 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2700, while the sum is 26.

The square root of 25352009 is about 5035.0778544130. The cubic root of 25352009 is about 293.7677566450.

The spelling of 25352009 in words is "twenty-five million, three hundred fifty-two thousand, nine".