25838381 has 2 divisors, whose sum is σ = 25838382. Its totient is φ = 25838380.

The previous prime is 25838377. The next prime is 25838383. The reversal of 25838381 is 18383852.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 24661156 + 1177225 = 4966^2 + 1085^2 .

It is a cyclic number.

It is not a de Polignac number, because 25838381 - 2² = 25838377 is a prime.

It is a super-2 number, since 2×25838381² = 1335243865402322, which contains 22 as substring.

Together with 25838383, it forms a pair of twin primes.

It is a Chen prime.

It is an alternating number because its digits alternate between even and odd.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (25838383) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12919190 + 12919191.

It is an arithmetic number, because the mean of its divisors is an integer number (12919191).

Almost surely, 2^25838381 is an apocalyptic number.

It is an amenable number.

25838381 is a deficient number, since it is larger than the sum of its proper divisors (1).

25838381 is an equidigital number, since it uses as much as digits as its factorization.

25838381 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 46080, while the sum is 38.

The square root of 25838381 is about 5083.1467616035. The cubic root of 25838381 is about 295.6344899492.

The spelling of 25838381 in words is "twenty-five million, eight hundred thirty-eight thousand, three hundred eighty-one".