100207609 has 4 divisors (see below), whose sum is σ = 101094516. Its totient is φ = 99320704.

The previous prime is 100207603. The next prime is 100207631. The reversal of 100207609 is 906702001.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 906702001 = 607 ⋅1493743.

It can be written as a sum of positive squares in 2 ways, for example, as 1006009 + 99201600 = 1003^2 + 9960^2 .

It is a cyclic number.

It is not a de Polignac number, because 100207609 - 2¹¹ = 100205561 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (100207603) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 443284 + ... + 443509.

It is an arithmetic number, because the mean of its divisors is an integer number (25273629).

Almost surely, 2^100207609 is an apocalyptic number.

It is an amenable number.

100207609 is a deficient number, since it is larger than the sum of its proper divisors (886907).

100207609 is an equidigital number, since it uses as much as digits as its factorization.

100207609 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 886906.

The product of its (nonzero) digits is 756, while the sum is 25.

The square root of 100207609 is about 10010.3750678983. The cubic root of 100207609 is about 464.4798732011.

The spelling of 100207609 in words is "one hundred million, two hundred seven thousand, six hundred nine".