9885961 has 6 divisors (see below), whose sum is σ = 10134686.
Its totient is φ = 9643200.
The previous prime is 9885913. The next prime is 9885979. The reversal of 9885961 is 1695889.
It can be written as a sum of positive squares in 3 ways, for example, as 1225 + 9884736 = 35^2 + 3144^2
It is a de Polignac number, because none of the positive numbers 2k-9885961 is a prime.
It is an Ulam number.
It is a Duffinian number.
It is not an unprimeable number, because it can be changed into a prime (9885901) by changing a digit.
It is a pernicious number, because its binary representation contains a prime number (11) of ones.
It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1260 + ... + 4621.
Almost surely, 29885961 is an apocalyptic number.
9885961 is the 1681-st nonagonal number.
It is an amenable number.
9885961 is a deficient number, since it is larger than the sum of its proper divisors (248725).
9885961 is an equidigital number, since it uses as much as digits as its factorization.
9885961 is an odious number, because the sum of its binary digits is odd.
The sum of its prime factors is 5963 (or 5922 counting only the distinct ones).
The product of its digits is 155520, while the sum is 46.
The square root of 9885961 is about 3144.1948094862.
The cubic root of 9885961 is about 214.6213707374.
The spelling of 9885961 in words is "nine million, eight hundred eighty-five thousand, nine hundred sixty-one".