75000009 has 8 divisors (see below), whose sum is σ = 114285760. Its totient is φ = 42857136.

The previous prime is 75000007. The next prime is 75000017. The reversal of 75000009 is 90000057.

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

It is not a de Polignac number, because 75000009 - 2¹ = 75000007 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21), and also a Moran number because the ratio is a prime number: 3571429 = 75000009 / (7 + 5 + 0 + 0 + 0 + 0 + 0 + 9).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (75000007) 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, 1785694 + ... + 1785735.

It is an arithmetic number, because the mean of its divisors is an integer number (14285720).

Almost surely, 2^75000009 is an apocalyptic number.

It is an amenable number.

75000009 is a deficient number, since it is larger than the sum of its proper divisors (39285751).

75000009 is a wasteful number, since it uses less digits than its factorization.

75000009 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3571439.

The product of its (nonzero) digits is 315, while the sum is 21.

The square root of 75000009 is about 8660.2545574596. The cubic root of 75000009 is about 421.7163495195.

The spelling of 75000009 in words is "seventy-five million, nine", and thus it is an aban number and an uban number.