25394819 has 2 divisors, whose sum is σ = 25394820. Its totient is φ = 25394818.

The previous prime is 25394801. The next prime is 25394851. The reversal of 25394819 is 91849352.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 25394819 - 2¹² = 25390723 is a prime.

It is a super-2 number, since 2×25394819² = 1289793664085522, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (25394879) 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, 12697409 + 12697410.

It is an arithmetic number, because the mean of its divisors is an integer number (12697410).

Almost surely, 2^25394819 is an apocalyptic number.

25394819 is a deficient number, since it is larger than the sum of its proper divisors (1).

25394819 is an equidigital number, since it uses as much as digits as its factorization.

25394819 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 77760, while the sum is 41.

The square root of 25394819 is about 5039.3272368442. The cubic root of 25394819 is about 293.9330180447.

The spelling of 25394819 in words is "twenty-five million, three hundred ninety-four thousand, eight hundred nineteen".