984609681 has 8 divisors (see below), whose sum is σ = 1432159584. Its totient is φ = 596733120.

The previous prime is 984609677. The next prime is 984609707. The reversal of 984609681 is 186906489.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 984609681 - 2² = 984609677 is a prime.

It is a super-2 number, since 2×984609681² = 1938912447837843522, which contains 22 as substring.

It is a Smith number, since the sum of its digits (51) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (984609881) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 14918296 + ... + 14918361.

It is an arithmetic number, because the mean of its divisors is an integer number (179019948).

Almost surely, 2^984609681 is an apocalyptic number.

It is an amenable number.

984609681 is a deficient number, since it is larger than the sum of its proper divisors (447549903).

984609681 is a wasteful number, since it uses less digits than its factorization.

984609681 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29836671.

The product of its (nonzero) digits is 746496, while the sum is 51.

The square root of 984609681 is about 31378.4907380836. The cubic root of 984609681 is about 994.8433483170.

The spelling of 984609681 in words is "nine hundred eighty-four million, six hundred nine thousand, six hundred eighty-one".