25099859 has 2 divisors, whose sum is σ = 25099860. Its totient is φ = 25099858.

The previous prime is 25099847. The next prime is 25099861. The reversal of 25099859 is 95899052.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 25099859 - 2¹⁶ = 25034323 is a prime.

Together with 25099861, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (25099829) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12549929 + 12549930.

It is an arithmetic number, because the mean of its divisors is an integer number (12549930).

Almost surely, 2^25099859 is an apocalyptic number.

25099859 is a deficient number, since it is larger than the sum of its proper divisors (1).

25099859 is an equidigital number, since it uses as much as digits as its factorization.

25099859 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 291600, while the sum is 47.

The square root of 25099859 is about 5009.9759480461. The cubic root of 25099859 is about 292.7905759244.

The spelling of 25099859 in words is "twenty-five million, ninety-nine thousand, eight hundred fifty-nine".