25116109 has 2 divisors, whose sum is σ = 25116110. Its totient is φ = 25116108.

The previous prime is 25116101. The next prime is 25116127. The reversal of 25116109 is 90161152.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 15642025 + 9474084 = 3955^2 + 3078^2 .

It is a cyclic number.

It is not a de Polignac number, because 25116109 - 2³ = 25116101 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (25116101) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12558054 + 12558055.

It is an arithmetic number, because the mean of its divisors is an integer number (12558055).

Almost surely, 2^25116109 is an apocalyptic number.

It is an amenable number.

25116109 is a deficient number, since it is larger than the sum of its proper divisors (1).

25116109 is an equidigital number, since it uses as much as digits as its factorization.

25116109 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 540, while the sum is 25.

The square root of 25116109 is about 5011.5974499155. The cubic root of 25116109 is about 292.8537478658.

The spelling of 25116109 in words is "twenty-five million, one hundred sixteen thousand, one hundred nine".