245204191 has 2 divisors, whose sum is σ = 245204192. Its totient is φ = 245204190.

The previous prime is 245204171. The next prime is 245204207. The reversal of 245204191 is 191402542.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 245204191 - 2¹¹ = 245202143 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (245204171) 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, 122602095 + 122602096.

It is an arithmetic number, because the mean of its divisors is an integer number (122602096).

Almost surely, 2^245204191 is an apocalyptic number.

245204191 is a deficient number, since it is larger than the sum of its proper divisors (1).

245204191 is an equidigital number, since it uses as much as digits as its factorization.

245204191 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2880, while the sum is 28.

The square root of 245204191 is about 15658.9971262530. The cubic root of 245204191 is about 625.9062615887.

The spelling of 245204191 in words is "two hundred forty-five million, two hundred four thousand, one hundred ninety-one".