984879592921 has 9 divisors (see below), whose sum is σ = 1145684342271. Its totient is φ = 844176553752.

The previous prime is 984879592891. The next prime is 984879592927. The reversal of 984879592921 is 129295978489.

The square root of 984879592921 is 992411.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 106978055625 + 877901537296 = 327075^2 + 936964^2 .

It is not a de Polignac number, because 984879592921 - 2⁵ = 984879592889 is a prime.

It is not an unprimeable number, because it can be changed into a prime (984879592927) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 6875991 + ... + 7017763.

Almost surely, 2^984879592921 is an apocalyptic number.

984879592921 is the 992411-st square number.

984879592921 is the 496206-th centered octagonal number.

It is an amenable number.

984879592921 is a deficient number, since it is larger than the sum of its proper divisors (160804749350).

984879592921 is an frugal number, since it uses more digits than its factorization.

984879592921 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 283560 (or 141780 counting only the distinct ones).

The product of its digits is 235146240, while the sum is 73.

The spelling of 984879592921 in words is "nine hundred eighty-four billion, eight hundred seventy-nine million, five hundred ninety-two thousand, nine hundred twenty-one".