894638143 has 4 divisors (see below), whose sum is σ = 1022443600. Its totient is φ = 766832688.

The previous prime is 894638089. The next prime is 894638189. The reversal of 894638143 is 341836498.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-894638143 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 894638093 and 894638102.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (894638543) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 63902718 + ... + 63902731.

It is an arithmetic number, because the mean of its divisors is an integer number (255610900).

Almost surely, 2^894638143 is an apocalyptic number.

894638143 is a deficient number, since it is larger than the sum of its proper divisors (127805457).

894638143 is a wasteful number, since it uses less digits than its factorization.

894638143 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 127805456.

The product of its digits is 497664, while the sum is 46.

The square root of 894638143 is about 29910.5022191203. The cubic root of 894638143 is about 963.5682250959.

It can be divided in two parts, 8946 and 38143, that added together give a square (47089 = 217²).

The spelling of 894638143 in words is "eight hundred ninety-four million, six hundred thirty-eight thousand, one hundred forty-three".