25463509 has 2 divisors, whose sum is σ = 25463510. Its totient is φ = 25463508.

The previous prime is 25463497. The next prime is 25463527. The reversal of 25463509 is 90536452.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 21362884 + 4100625 = 4622^2 + 2025^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-25463509 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (25463579) 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, 12731754 + 12731755.

It is an arithmetic number, because the mean of its divisors is an integer number (12731755).

Almost surely, 2^25463509 is an apocalyptic number.

It is an amenable number.

25463509 is a deficient number, since it is larger than the sum of its proper divisors (1).

25463509 is an equidigital number, since it uses as much as digits as its factorization.

25463509 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 32400, while the sum is 34.

The square root of 25463509 is about 5046.1380282351. The cubic root of 25463509 is about 294.1977975420.

The spelling of 25463509 in words is "twenty-five million, four hundred sixty-three thousand, five hundred nine".