25620347 has 2 divisors, whose sum is σ = 25620348. Its totient is φ = 25620346.

The previous prime is 25620281. The next prime is 25620349. The reversal of 25620347 is 74302652.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 25620347 - 2¹⁶ = 25554811 is a prime.

Together with 25620349, 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 (25620349) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12810173 + 12810174.

It is an arithmetic number, because the mean of its divisors is an integer number (12810174).

Almost surely, 2^25620347 is an apocalyptic number.

25620347 is a deficient number, since it is larger than the sum of its proper divisors (1).

25620347 is an equidigital number, since it uses as much as digits as its factorization.

25620347 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 10080, while the sum is 29.

The square root of 25620347 is about 5061.6545713828. The cubic root of 25620347 is about 294.8005814937.

Adding to 25620347 its reverse (74302652), we get a palindrome (99922999).

The spelling of 25620347 in words is "twenty-five million, six hundred twenty thousand, three hundred forty-seven".