9979281 has 33 divisors (see below), whose sum is σ = 16208859. Its totient is φ = 6141096.

The previous prime is 9979273. The next prime is 9979283. The reversal of 9979281 is 1829799.

The square root of 9979281 is 3159.

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., 1476225 + 8503056 = 1215^2 + 2916^2 .

It is not a de Polignac number, because 9979281 - 2³ = 9979273 is a prime.

It is a super-2 number, since 2×9979281² = 199172098553922, which contains 22 as substring.

Its product of digits (81648) is a multiple of the sum of its prime divisors (16).

It is not an unprimeable number, because it can be changed into a prime (9979283) by changing a digit.

It is a polite number, since it can be written in 32 ways as a sum of consecutive naturals, for example, 767631 + ... + 767643.

Almost surely, 2^9979281 is an apocalyptic number.

9979281 is the 3159-th square number.

9979281 is the 1580-th centered octagonal number.

It is an amenable number.

9979281 is a deficient number, since it is larger than the sum of its proper divisors (6229578).

9979281 is an frugal number, since it uses more digits than its factorization.

9979281 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 56 (or 16 counting only the distinct ones).

The product of its digits is 81648, while the sum is 45.

The cubic root of 9979281 is about 215.2945736826.

The spelling of 9979281 in words is "nine million, nine hundred seventy-nine thousand, two hundred eighty-one".