209899413 has 12 divisors (see below), whose sum is σ = 304270668. Its totient is φ = 139433280.

The previous prime is 209899399. The next prime is 209899433. The reversal of 209899413 is 314998902.

209899413 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 139641489 + 70257924 = 11817^2 + 8382^2 .

It is not a de Polignac number, because 209899413 - 2⁴ = 209899397 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (209899433) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 38970 + ... + 44027.

It is an arithmetic number, because the mean of its divisors is an integer number (25355889).

Almost surely, 2^209899413 is an apocalyptic number.

It is an amenable number.

209899413 is a deficient number, since it is larger than the sum of its proper divisors (94371255).

209899413 is a wasteful number, since it uses less digits than its factorization.

209899413 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 83284 (or 83281 counting only the distinct ones).

The product of its (nonzero) digits is 139968, while the sum is 45.

The square root of 209899413 is about 14487.9057492793. The cubic root of 209899413 is about 594.2972783300.

The spelling of 209899413 in words is "two hundred nine million, eight hundred ninety-nine thousand, four hundred thirteen".