25816859 has 2 divisors, whose sum is σ = 25816860. Its totient is φ = 25816858.

The previous prime is 25816837. The next prime is 25816871. The reversal of 25816859 is 95861852.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 25816859 - 2²⁴ = 9039643 is a prime.

It is a super-3 number, since 3×25816859³ (a number of 23 digits) contains 333 as substring.

It is not a weakly prime, because it can be changed into another prime (25816159) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12908429 + 12908430.

It is an arithmetic number, because the mean of its divisors is an integer number (12908430).

Almost surely, 2^25816859 is an apocalyptic number.

25816859 is a deficient number, since it is larger than the sum of its proper divisors (1).

25816859 is an equidigital number, since it uses as much as digits as its factorization.

25816859 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 172800, while the sum is 44.

The square root of 25816859 is about 5081.0293248514. The cubic root of 25816859 is about 295.5523845354.

The spelling of 25816859 in words is "twenty-five million, eight hundred sixteen thousand, eight hundred fifty-nine".