9999998281 has 64 divisors (see below), whose sum is σ = 13886208000. Its totient is φ = 6968042496.

The previous prime is 9999998273. The next prime is 9999998311. The reversal of 9999998281 is 1828999999.

It is a cyclic number.

It is not a de Polignac number, because 9999998281 - 2³ = 9999998273 is a prime.

It is a super-2 number, since 2×9999998281² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (9999998231) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 2437570 + ... + 2441668.

It is an arithmetic number, because the mean of its divisors is an integer number (216972000).

Almost surely, 2^9999998281 is an apocalyptic number.

9999998281 is a gapful number since it is divisible by the number (91) formed by its first and last digit.

It is an amenable number.

9999998281 is a deficient number, since it is larger than the sum of its proper divisors (3886209719).

9999998281 is a wasteful number, since it uses less digits than its factorization.

9999998281 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4238.

The product of its digits is 68024448, while the sum is 73.

The square root of 9999998281 is about 99999.9914049996. The cubic root of 9999998281 is about 2154.4345665828.

The spelling of 9999998281 in words is "nine billion, nine hundred ninety-nine million, nine hundred ninety-eight thousand, two hundred eighty-one".