9880209 has 18 divisors (see below), whose sum is σ = 15067026. Its totient is φ = 6238080.

The previous prime is 9880201. The next prime is 9880223. The reversal of 9880209 is 9020889.

It can be written as a sum of positive squares in only one way, i.e., 9828225 + 51984 = 3135^2 + 228^2 .

It is not a de Polignac number, because 9880209 - 2³ = 9880201 is a prime.

9880209 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (9880201) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 1729 + ... + 4769.

It is an arithmetic number, because the mean of its divisors is an integer number (837057).

Almost surely, 2^9880209 is an apocalyptic number.

It is an amenable number.

9880209 is a deficient number, since it is larger than the sum of its proper divisors (5186817).

9880209 is a wasteful number, since it uses less digits than its factorization.

9880209 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3085 (or 3063 counting only the distinct ones).

The product of its (nonzero) digits is 10368, while the sum is 36.

The square root of 9880209 is about 3143.2799748034. The cubic root of 9880209 is about 214.5797379065.

The spelling of 9880209 in words is "nine million, eight hundred eighty thousand, two hundred nine".