281490075089 has 4 divisors (see below), whose sum is σ = 284392034724. Its totient is φ = 278588115456.

The previous prime is 281490075073. The next prime is 281490075103. The reversal of 281490075089 is 980570094182.

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 139944824464 + 141545250625 = 374092^2 + 376225^2 .

It is a cyclic number.

It is not a de Polignac number, because 281490075089 - 2⁴ = 281490075073 is a prime.

It is a super-2 number, since 2×281490075089² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 281490075089.

It is not an unprimeable number, because it can be changed into a prime (281490075029) 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, 1450979672 + ... + 1450979865.

It is an arithmetic number, because the mean of its divisors is an integer number (71098008681).

Almost surely, 2^281490075089 is an apocalyptic number.

It is an amenable number.

281490075089 is a deficient number, since it is larger than the sum of its proper divisors (2901959635).

281490075089 is an equidigital number, since it uses as much as digits as its factorization.

281490075089 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2901959634.

The product of its (nonzero) digits is 1451520, while the sum is 53.

The spelling of 281490075089 in words is "two hundred eighty-one billion, four hundred ninety million, seventy-five thousand, eighty-nine".