9981798129 has 16 divisors (see below), whose sum is σ = 15430800000. Its totient is φ = 6365204208.

The previous prime is 9981798119. The next prime is 9981798139. The reversal of 9981798129 is 9218971899.

It is an interprime number because it is at equal distance from previous prime (9981798119) and next prime (9981798139).

It is not a de Polignac number, because 9981798129 - 2¹⁷ = 9981667057 is a prime.

It is not an unprimeable number, because it can be changed into a prime (9981798109) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8036254 + ... + 8037495.

It is an arithmetic number, because the mean of its divisors is an integer number (964425000).

Almost surely, 2^9981798129 is an apocalyptic number.

It is an amenable number.

9981798129 is a deficient number, since it is larger than the sum of its proper divisors (5449001871).

9981798129 is a wasteful number, since it uses less digits than its factorization.

9981798129 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16073781 (or 16073775 counting only the distinct ones).

The product of its digits is 5878656, while the sum is 63.

The square root of 9981798129 is about 99908.9491937534. The cubic root of 9981798129 is about 2153.1267380613.

The spelling of 9981798129 in words is "nine billion, nine hundred eighty-one million, seven hundred ninety-eight thousand, one hundred twenty-nine".