25364809 has 2 divisors, whose sum is σ = 25364810. Its totient is φ = 25364808.

The previous prime is 25364783. The next prime is 25364863. The reversal of 25364809 is 90846352.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 20502784 + 4862025 = 4528^2 + 2205^2 .

It is a cyclic number.

It is not a de Polignac number, because 25364809 - 2⁵ = 25364777 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (25364309) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12682404 + 12682405.

It is an arithmetic number, because the mean of its divisors is an integer number (12682405).

Almost surely, 2^25364809 is an apocalyptic number.

It is an amenable number.

25364809 is a deficient number, since it is larger than the sum of its proper divisors (1).

25364809 is an equidigital number, since it uses as much as digits as its factorization.

25364809 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 51840, while the sum is 37.

The square root of 25364809 is about 5036.3487766437. The cubic root of 25364809 is about 293.8171885543.

The spelling of 25364809 in words is "twenty-five million, three hundred sixty-four thousand, eight hundred nine".