891204241 has 2 divisors, whose sum is σ = 891204242. Its totient is φ = 891204240.

The previous prime is 891204239. The next prime is 891204247. The reversal of 891204241 is 142402198.

891204241 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 588305025 + 302899216 = 24255^2 + 17404^2 .

It is a cyclic number.

It is not a de Polignac number, because 891204241 - 2¹ = 891204239 is a prime.

Together with 891204239, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (891204247) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 445602120 + 445602121.

It is an arithmetic number, because the mean of its divisors is an integer number (445602121).

Almost surely, 2^891204241 is an apocalyptic number.

It is an amenable number.

891204241 is a deficient number, since it is larger than the sum of its proper divisors (1).

891204241 is an equidigital number, since it uses as much as digits as its factorization.

891204241 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4608, while the sum is 31.

The square root of 891204241 is about 29853.0440826392. The cubic root of 891204241 is about 962.3338186361. Note that the first 3 decimals are identical.

The spelling of 891204241 in words is "eight hundred ninety-one million, two hundred four thousand, two hundred forty-one".