894481991 has 4 divisors (see below), whose sum is σ = 963288312. Its totient is φ = 825675672.

The previous prime is 894481933. The next prime is 894481997. The reversal of 894481991 is 199184498.

894481991 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a cyclic number.

It is not a de Polignac number, because 894481991 - 2¹⁸ = 894219847 is a prime.

It is a super-3 number, since 3×894481991³ (a number of 28 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (894481997) 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, 34403141 + ... + 34403166.

It is an arithmetic number, because the mean of its divisors is an integer number (240822078).

Almost surely, 2^894481991 is an apocalyptic number.

894481991 is a deficient number, since it is larger than the sum of its proper divisors (68806321).

894481991 is a wasteful number, since it uses less digits than its factorization.

894481991 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 68806320.

The product of its digits is 746496, while the sum is 53.

The square root of 894481991 is about 29907.8917846110. The cubic root of 894481991 is about 963.5121607673.

The spelling of 894481991 in words is "eight hundred ninety-four million, four hundred eighty-one thousand, nine hundred ninety-one".