894854809493 has 2 divisors, whose sum is σ = 894854809494. Its totient is φ = 894854809492.

The previous prime is 894854809423. The next prime is 894854809523. The reversal of 894854809493 is 394908458498.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 844500347089 + 50354462404 = 918967^2 + 224398^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-894854809493 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (894854809423) 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, 447427404746 + 447427404747.

It is an arithmetic number, because the mean of its divisors is an integer number (447427404747).

Almost surely, 2^894854809493 is an apocalyptic number.

It is an amenable number.

894854809493 is a deficient number, since it is larger than the sum of its proper divisors (1).

894854809493 is an equidigital number, since it uses as much as digits as its factorization.

894854809493 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 358318080, while the sum is 71.

The spelling of 894854809493 in words is "eight hundred ninety-four billion, eight hundred fifty-four million, eight hundred nine thousand, four hundred ninety-three".