891714641 has 2 divisors, whose sum is σ = 891714642. Its totient is φ = 891714640.

The previous prime is 891714601. The next prime is 891714643. The reversal of 891714641 is 146417198.

891714641 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 504451600 + 387263041 = 22460^2 + 19679^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-891714641 is a prime.

Together with 891714643, 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 (891714643) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 445857320 + 445857321.

It is an arithmetic number, because the mean of its divisors is an integer number (445857321).

Almost surely, 2^891714641 is an apocalyptic number.

It is an amenable number.

891714641 is a deficient number, since it is larger than the sum of its proper divisors (1).

891714641 is an equidigital number, since it uses as much as digits as its factorization.

891714641 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 48384, while the sum is 41.

The square root of 891714641 is about 29861.5914009954. The cubic root of 891714641 is about 962.5174957409.

The spelling of 891714641 in words is "eight hundred ninety-one million, seven hundred fourteen thousand, six hundred forty-one".