9989161 has 16 divisors (see below), whose sum is σ = 12694528.
Its totient is φ = 7646400.
The previous prime is 9989159. The next prime is 9989167. The reversal of 9989161 is 1619899.
It is a cyclic number.
It is not a de Polignac number, because 9989161 - 21 = 9989159 is a prime.
It is a deceptive number, since it divides R9989160.
It is not an unprimeable number, because it can be changed into a prime (9989167) 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, 1051 + ... + 4591.
It is an arithmetic number, because the mean of its divisors is an integer number (793408).
Almost surely, 29989161 is an apocalyptic number.
9989161 is a gapful number since it is divisible by the number (91) formed by its first and last digit.
It is an amenable number.
9989161 is a deficient number, since it is larger than the sum of its proper divisors (2705367).
9989161 is a wasteful number, since it uses less digits than its factorization.
9989161 is an evil number, because the sum of its binary digits is even.
The sum of its prime factors is 3592.
The product of its digits is 34992, while the sum is 43.
The square root of 9989161 is about 3160.5633991426.
The cubic root of 9989161 is about 215.3656011374.
The spelling of 9989161 in words is "nine million, nine hundred eighty-nine thousand, one hundred sixty-one".