9278998121 has 8 divisors (see below), whose sum is σ = 9586852800. Its totient is φ = 8974147248.

The previous prime is 9278998097. The next prime is 9278998129. The reversal of 9278998121 is 1218998729.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-9278998121 is a prime.

It is a super-2 number, since 2×9278998121² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (9278998129) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 744671 + ... + 757028.

It is an arithmetic number, because the mean of its divisors is an integer number (1198356600).

Almost surely, 2^9278998121 is an apocalyptic number.

It is an amenable number.

9278998121 is a deficient number, since it is larger than the sum of its proper divisors (307854679).

9278998121 is a wasteful number, since it uses less digits than its factorization.

9278998121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1501903.

The product of its digits is 1306368, while the sum is 56.

The square root of 9278998121 is about 96327.5563948344. The cubic root of 9278998121 is about 2101.3595218593.

The spelling of 9278998121 in words is "nine billion, two hundred seventy-eight million, nine hundred ninety-eight thousand, one hundred twenty-one".