8089889281 has 4 divisors (see below), whose sum is σ = 8090140372. Its totient is φ = 8089638192.

The previous prime is 8089889279. The next prime is 8089889287. The reversal of 8089889281 is 1829889808.

It is a happy number.

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

It can be written as a sum of positive squares in 2 ways, for example, as 864889281 + 7225000000 = 29409^2 + 85000^2 .

It is a cyclic number.

It is not a de Polignac number, because 8089889281 - 2¹ = 8089889279 is a prime.

It is a super-2 number, since 2×8089889281² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (8089889287) 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, 68610 + ... + 144523.

It is an arithmetic number, because the mean of its divisors is an integer number (2022535093).

Almost surely, 2^8089889281 is an apocalyptic number.

It is an amenable number.

8089889281 is a deficient number, since it is larger than the sum of its proper divisors (251091).

8089889281 is a wasteful number, since it uses less digits than its factorization.

8089889281 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 251090.

The product of its (nonzero) digits is 5308416, while the sum is 61.

The square root of 8089889281 is about 89943.8117993673. The cubic root of 8089889281 is about 2007.4628914056.

It can be divided in two parts, 80 and 89889281, that added together give a square (89889361 = 9481²).

The spelling of 8089889281 in words is "eight billion, eighty-nine million, eight hundred eighty-nine thousand, two hundred eighty-one".