889242561 has 6 divisors (see below), whose sum is σ = 1284461490. Its totient is φ = 592828368.

The previous prime is 889242551. The next prime is 889242581. The reversal of 889242561 is 165242988.

889242561 is a `hidden beast` number, since 8 + 89 + 2 + 4 + 2 + 561 = 666.

It can be written as a sum of positive squares in only one way, i.e., 611820225 + 277422336 = 24735^2 + 16656^2 .

It is not a de Polignac number, because 889242561 - 2⁷ = 889242433 is a prime.

It is not an unprimeable number, because it can be changed into a prime (889242551) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 49402356 + ... + 49402373.

It is an arithmetic number, because the mean of its divisors is an integer number (214076915).

Almost surely, 2^889242561 is an apocalyptic number.

It is an amenable number.

889242561 is a deficient number, since it is larger than the sum of its proper divisors (395218929).

889242561 is a wasteful number, since it uses less digits than its factorization.

889242561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 98804735 (or 98804732 counting only the distinct ones).

The product of its digits is 276480, while the sum is 45.

The square root of 889242561 is about 29820.1703717467. The cubic root of 889242561 is about 961.6272174919.

The spelling of 889242561 in words is "eight hundred eighty-nine million, two hundred forty-two thousand, five hundred sixty-one".