25109839 has 2 divisors, whose sum is σ = 25109840. Its totient is φ = 25109838.

The previous prime is 25109827. The next prime is 25109881. The reversal of 25109839 is 93890152.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 25109839 - 2¹³ = 25101647 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 25109798 and 25109807.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (25109899) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12554919 + 12554920.

It is an arithmetic number, because the mean of its divisors is an integer number (12554920).

Almost surely, 2^25109839 is an apocalyptic number.

25109839 is a deficient number, since it is larger than the sum of its proper divisors (1).

25109839 is an equidigital number, since it uses as much as digits as its factorization.

25109839 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 19440, while the sum is 37.

The square root of 25109839 is about 5010.9718618248. The cubic root of 25109839 is about 292.8293764446.

The spelling of 25109839 in words is "twenty-five million, one hundred nine thousand, eight hundred thirty-nine".