209011007 has 8 divisors (see below), whose sum is σ = 212245920. Its totient is φ = 205784320.

The previous prime is 209010979. The next prime is 209011031. The reversal of 209011007 is 700110902.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 209011007 - 2¹⁸ = 208748863 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 209011007.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (209011037) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 66119 + ... + 69207.

It is an arithmetic number, because the mean of its divisors is an integer number (26530740).

Almost surely, 2^209011007 is an apocalyptic number.

209011007 is a deficient number, since it is larger than the sum of its proper divisors (3234913).

209011007 is an equidigital number, since it uses as much as digits as its factorization.

209011007 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4113.

The product of its (nonzero) digits is 126, while the sum is 20.

The square root of 209011007 is about 14457.2129748441. The cubic root of 209011007 is about 593.4576318372.

Adding to 209011007 its reverse (700110902), we get a palindrome (909121909).

The spelling of 209011007 in words is "two hundred nine million, eleven thousand, seven".