981834109 has 4 divisors (see below), whose sum is σ = 1008370204. Its totient is φ = 955298016.

The previous prime is 981834103. The next prime is 981834149. The reversal of 981834109 is 901438189.

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 928908484 + 52925625 = 30478^2 + 7275^2 .

It is a cyclic number.

It is not a de Polignac number, because 981834109 - 2⁷ = 981833981 is a prime.

It is an alternating number because its digits alternate between odd and even.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (981834103) 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, 13267992 + ... + 13268065.

It is an arithmetic number, because the mean of its divisors is an integer number (252092551).

Almost surely, 2^981834109 is an apocalyptic number.

It is an amenable number.

981834109 is a deficient number, since it is larger than the sum of its proper divisors (26536095).

981834109 is a wasteful number, since it uses less digits than its factorization.

981834109 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26536094.

The product of its (nonzero) digits is 62208, while the sum is 43.

The square root of 981834109 is about 31334.2322229219. The cubic root of 981834109 is about 993.9076617907.

The spelling of 981834109 in words is "nine hundred eighty-one million, eight hundred thirty-four thousand, one hundred nine".