209980337 has 6 divisors (see below), whose sum is σ = 244262898. Its totient is φ = 179983104.

The previous prime is 209980327. The next prime is 209980367. The reversal of 209980337 is 733089902.

It can be written as a sum of positive squares in only one way, i.e., 198359056 + 11621281 = 14084^2 + 3409^2 .

It is not a de Polignac number, because 209980337 - 2⁶ = 209980273 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 209980294 and 209980303.

It is not an unprimeable number, because it can be changed into a prime (209980327) 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, 2142608 + ... + 2142705.

It is an arithmetic number, because the mean of its divisors is an integer number (40710483).

Almost surely, 2^209980337 is an apocalyptic number.

It is an amenable number.

209980337 is a deficient number, since it is larger than the sum of its proper divisors (34282561).

209980337 is an equidigital number, since it uses as much as digits as its factorization.

209980337 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4285327 (or 4285320 counting only the distinct ones).

The product of its (nonzero) digits is 81648, while the sum is 41.

The square root of 209980337 is about 14490.6982923529. The cubic root of 209980337 is about 594.3736430564.

The spelling of 209980337 in words is "two hundred nine million, nine hundred eighty thousand, three hundred thirty-seven".