894667921 has 9 divisors (see below), whose sum is σ = 1040979771. Its totient is φ = 766678752.

The previous prime is 894667919. The next prime is 894667987. The reversal of 894667921 is 129766498.

It is a happy number.

The square root of 894667921 is 29911.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 242580625 + 652087296 = 15575^2 + 25536^2 .

It is not a de Polignac number, because 894667921 - 2¹ = 894667919 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (894667901) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 207241 + ... + 211513.

It is an arithmetic number, because the mean of its divisors is an integer number (115664419).

Almost surely, 2^894667921 is an apocalyptic number.

894667921 is the 29911-st square number.

894667921 is the 14956-th centered octagonal number.

It is an amenable number.

894667921 is a deficient number, since it is larger than the sum of its proper divisors (146311850).

894667921 is an frugal number, since it uses more digits than its factorization.

894667921 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8560 (or 4280 counting only the distinct ones).

The product of its digits is 1306368, while the sum is 52.

The cubic root of 894667921 is about 963.5789157558.

It can be divided in two parts, 8946 and 67921, that added together give a palindrome (76867).

The spelling of 894667921 in words is "eight hundred ninety-four million, six hundred sixty-seven thousand, nine hundred twenty-one".