894171663 has 64 divisors (see below), whose sum is σ = 1686896640. Its totient is φ = 454572000.

The previous prime is 894171659. The next prime is 894171679. The reversal of 894171663 is 366171498.

It is a happy number.

It is not a de Polignac number, because 894171663 - 2² = 894171659 is a prime.

It is a Smith number, since the sum of its digits (45) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (894171613) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 93138 + ... + 102288.

It is an arithmetic number, because the mean of its divisors is an integer number (26357760).

Almost surely, 2^894171663 is an apocalyptic number.

894171663 is a deficient number, since it is larger than the sum of its proper divisors (792724977).

894171663 is a wasteful number, since it uses less digits than its factorization.

894171663 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9225 (or 9219 counting only the distinct ones).

The product of its digits is 217728, while the sum is 45.

The square root of 894171663 is about 29902.7032724468. The cubic root of 894171663 is about 963.4007221954.

The spelling of 894171663 in words is "eight hundred ninety-four million, one hundred seventy-one thousand, six hundred sixty-three".