981911227 has 4 divisors (see below), whose sum is σ = 1071175896. Its totient is φ = 892646560.

The previous prime is 981911209. The next prime is 981911243. The reversal of 981911227 is 722119189.

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 981911227 - 2¹¹ = 981909179 is a prime.

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 981911227.

It is not an unprimeable number, because it can be changed into a prime (981911207) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 44632318 + ... + 44632339.

It is an arithmetic number, because the mean of its divisors is an integer number (267793974).

Almost surely, 2^981911227 is an apocalyptic number.

981911227 is a deficient number, since it is larger than the sum of its proper divisors (89264669).

981911227 is a wasteful number, since it uses less digits than its factorization.

981911227 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 89264668.

The product of its digits is 18144, while the sum is 40.

The square root of 981911227 is about 31335.4627698395. The cubic root of 981911227 is about 993.9336832145.

The spelling of 981911227 in words is "nine hundred eighty-one million, nine hundred eleven thousand, two hundred twenty-seven".