9899071 has 16 divisors (see below), whose sum is σ = 12271168. Its totient is φ = 7776000.

The previous prime is 9899069. The next prime is 9899119. The reversal of 9899071 is 1709989.

It is a 8-Lehmer number, since φ(9899071) divides (9899071-1)⁸.

It is a cyclic number.

It is not a de Polignac number, because 9899071 - 2¹ = 9899069 is a prime.

9899071 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9899041) 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 15 ways as a sum of consecutive naturals, for example, 16171 + ... + 16771.

It is an arithmetic number, because the mean of its divisors is an integer number (766948).

Almost surely, 2^9899071 is an apocalyptic number.

9899071 is a gapful number since it is divisible by the number (91) formed by its first and last digit.

9899071 is a deficient number, since it is larger than the sum of its proper divisors (2372097).

9899071 is a wasteful number, since it uses less digits than its factorization.

9899071 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 802.

The product of its (nonzero) digits is 40824, while the sum is 43.

The square root of 9899071 is about 3146.2789132561. The cubic root of 9899071 is about 214.7162002746.

The spelling of 9899071 in words is "nine million, eight hundred ninety-nine thousand, seventy-one".