25824109 has 2 divisors, whose sum is σ = 25824110. Its totient is φ = 25824108.

The previous prime is 25824077. The next prime is 25824119. The reversal of 25824109 is 90142852.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 25786084 + 38025 = 5078^2 + 195^2 .

It is a cyclic number.

It is not a de Polignac number, because 25824109 - 2⁵ = 25824077 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (25824119) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12912054 + 12912055.

It is an arithmetic number, because the mean of its divisors is an integer number (12912055).

Almost surely, 2^25824109 is an apocalyptic number.

It is an amenable number.

25824109 is a deficient number, since it is larger than the sum of its proper divisors (1).

25824109 is an equidigital number, since it uses as much as digits as its factorization.

25824109 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5760, while the sum is 31.

The square root of 25824109 is about 5081.7427128890. The cubic root of 25824109 is about 295.5800480380.

The spelling of 25824109 in words is "twenty-five million, eight hundred twenty-four thousand, one hundred nine".