209008245 has 32 divisors (see below), whose sum is σ = 349857792. Its totient is φ = 106348352.

The previous prime is 209008243. The next prime is 209008253. The reversal of 209008245 is 542800902.

It is a cyclic number.

It is not a de Polignac number, because 209008245 - 2¹ = 209008243 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (209008243) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 235192 + ... + 236078.

It is an arithmetic number, because the mean of its divisors is an integer number (10933056).

Almost surely, 2^209008245 is an apocalyptic number.

It is an amenable number.

209008245 is a deficient number, since it is larger than the sum of its proper divisors (140849547).

209008245 is a wasteful number, since it uses less digits than its factorization.

209008245 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1601.

The product of its (nonzero) digits is 5760, while the sum is 30.

The square root of 209008245 is about 14457.1174512764. The cubic root of 209008245 is about 593.4550177209.

The spelling of 209008245 in words is "two hundred nine million, eight thousand, two hundred forty-five".