207242609 has 6 divisors (see below), whose sum is σ = 241078194. Its totient is φ = 177636480.

The previous prime is 207242603. The next prime is 207242611. The reversal of 207242609 is 906242702.

It can be written as a sum of positive squares in only one way, i.e., 196000000 + 11242609 = 14000^2 + 3353^2 .

It is not a de Polignac number, because 207242609 - 2⁴ = 207242593 is a prime.

It is not an unprimeable number, because it can be changed into a prime (207242603) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2114672 + ... + 2114769.

It is an arithmetic number, because the mean of its divisors is an integer number (40179699).

Almost surely, 2^207242609 is an apocalyptic number.

It is an amenable number.

207242609 is a deficient number, since it is larger than the sum of its proper divisors (33835585).

207242609 is an equidigital number, since it uses as much as digits as its factorization.

207242609 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4229455 (or 4229448 counting only the distinct ones).

The product of its (nonzero) digits is 12096, while the sum is 32.

The square root of 207242609 is about 14395.9233465589. The cubic root of 207242609 is about 591.7791826573.

The spelling of 207242609 in words is "two hundred seven million, two hundred forty-two thousand, six hundred nine".