981022789 has 4 divisors (see below), whose sum is σ = 991136524. Its totient is φ = 970909056.

The previous prime is 981022771. The next prime is 981022799. The reversal of 981022789 is 987220189.

981022789 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 can be written as a sum of positive squares in 2 ways, for example, as 368064225 + 612958564 = 19185^2 + 24758^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-981022789 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (981022709) 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, 5056722 + ... + 5056915.

It is an arithmetic number, because the mean of its divisors is an integer number (247784131).

Almost surely, 2^981022789 is an apocalyptic number.

It is an amenable number.

981022789 is a deficient number, since it is larger than the sum of its proper divisors (10113735).

981022789 is a wasteful number, since it uses less digits than its factorization.

981022789 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10113734.

The product of its (nonzero) digits is 145152, while the sum is 46.

The square root of 981022789 is about 31321.2833230058. The cubic root of 981022789 is about 993.6338207653.

The spelling of 981022789 in words is "nine hundred eighty-one million, twenty-two thousand, seven hundred eighty-nine".