10870209 has 27 divisors (see below), whose sum is σ = 18381987. Its totient is φ = 6171984.

The previous prime is 10870201. The next prime is 10870213. The reversal of 10870209 is 90207801.

The square root of 10870209 is 3297.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 3186225 + 7683984 = 1785^2 + 2772^2 .

It is not a de Polignac number, because 10870209 - 2³ = 10870201 is a prime.

It is a super-2 number, since 2×10870209² = 236322887407362, which contains 22 as substring.

It is a Curzon number.

It is a plaindrome in base 13.

It is not an unprimeable number, because it can be changed into a prime (10870201) 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 26 ways as a sum of consecutive naturals, for example, 69159 + ... + 69315.

Almost surely, 2^10870209 is an apocalyptic number.

10870209 is the 3297-th square number.

10870209 is the 1649-th centered octagonal number.

It is an amenable number.

10870209 is a deficient number, since it is larger than the sum of its proper divisors (7511778).

10870209 is an equidigital number, since it uses as much as digits as its factorization.

10870209 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 334 (or 167 counting only the distinct ones).

The product of its (nonzero) digits is 1008, while the sum is 27.

The cubic root of 10870209 is about 221.5198412112.

The spelling of 10870209 in words is "ten million, eight hundred seventy thousand, two hundred nine".