25860839 has 2 divisors, whose sum is σ = 25860840. Its totient is φ = 25860838.

The previous prime is 25860829. The next prime is 25860847. The reversal of 25860839 is 93806852.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-25860839 is a prime.

It is a Sophie Germain prime.

It is a junction number, because it is equal to n+sod(n) for n = 25860796 and 25860805.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (25860829) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12930419 + 12930420.

It is an arithmetic number, because the mean of its divisors is an integer number (12930420).

Almost surely, 2^25860839 is an apocalyptic number.

25860839 is a deficient number, since it is larger than the sum of its proper divisors (1).

25860839 is an equidigital number, since it uses as much as digits as its factorization.

25860839 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 103680, while the sum is 41.

The square root of 25860839 is about 5085.3553464827. The cubic root of 25860839 is about 295.7201175629.

The spelling of 25860839 in words is "twenty-five million, eight hundred sixty thousand, eight hundred thirty-nine".