207240009 has 8 divisors (see below), whose sum is σ = 276386880. Its totient is φ = 138126576.

The previous prime is 207240001. The next prime is 207240023. The reversal of 207240009 is 900042702.

207240009 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is not a de Polignac number, because 207240009 - 2³ = 207240001 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (207240001) 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, 17812 + ... + 27050.

It is an arithmetic number, because the mean of its divisors is an integer number (34548360).

Almost surely, 2^207240009 is an apocalyptic number.

It is an amenable number.

207240009 is a deficient number, since it is larger than the sum of its proper divisors (69146871).

207240009 is an equidigital number, since it uses as much as digits as its factorization.

207240009 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16719.

The product of its (nonzero) digits is 1008, while the sum is 24.

The square root of 207240009 is about 14395.8330429329. The cubic root of 207240009 is about 591.7767078891.

The spelling of 207240009 in words is "two hundred seven million, two hundred forty thousand, nine".