25899829 has 2 divisors, whose sum is σ = 25899830. Its totient is φ = 25899828.

The previous prime is 25899827. The next prime is 25899893. The reversal of 25899829 is 92899852.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 14326225 + 11573604 = 3785^2 + 3402^2 .

It is a cyclic number.

It is not a de Polignac number, because 25899829 - 2¹ = 25899827 is a prime.

It is a super-2 number, since 2×25899829² = 1341602284458482, which contains 22 as substring.

Together with 25899827, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (25899821) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12949914 + 12949915.

It is an arithmetic number, because the mean of its divisors is an integer number (12949915).

Almost surely, 2^25899829 is an apocalyptic number.

It is an amenable number.

25899829 is a deficient number, since it is larger than the sum of its proper divisors (1).

25899829 is an equidigital number, since it uses as much as digits as its factorization.

25899829 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 933120, while the sum is 52.

The square root of 25899829 is about 5089.1874597032. The cubic root of 25899829 is about 295.8686605347.

The spelling of 25899829 in words is "twenty-five million, eight hundred ninety-nine thousand, eight hundred twenty-nine".