209013371 has 18 divisors (see below), whose sum is σ = 248549868. Its totient is φ = 175251720.

The previous prime is 209013347. The next prime is 209013373. The reversal of 209013371 is 173310902.

It is not a de Polignac number, because 209013371 - 2⁶ = 209013307 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 209013371.

It is not an unprimeable number, because it can be changed into a prime (209013373) 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, 107276 + ... + 109206.

It is an arithmetic number, because the mean of its divisors is an integer number (13808326).

Almost surely, 2^209013371 is an apocalyptic number.

209013371 is a deficient number, since it is larger than the sum of its proper divisors (39536497).

209013371 is an equidigital number, since it uses as much as digits as its factorization.

209013371 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2039 (or 1985 counting only the distinct ones).

The product of its (nonzero) digits is 1134, while the sum is 26.

The square root of 209013371 is about 14457.2947331096. The cubic root of 209013371 is about 593.4598692449.

The spelling of 209013371 in words is "two hundred nine million, thirteen thousand, three hundred seventy-one".