75049209 has 12 divisors (see below), whose sum is σ = 111334756. Its totient is φ = 48680352.

The previous prime is 75049193. The next prime is 75049217. The reversal of 75049209 is 90294057.

It can be written as a sum of positive squares in 2 ways, for example, as 59721984 + 15327225 = 7728^2 + 3915^2 .

It is not a de Polignac number, because 75049209 - 2⁴ = 75049193 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (75049409) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 112354 + ... + 113019.

Almost surely, 2^75049209 is an apocalyptic number.

It is an amenable number.

75049209 is a deficient number, since it is larger than the sum of its proper divisors (36285547).

75049209 is a wasteful number, since it uses less digits than its factorization.

75049209 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 225416 (or 225413 counting only the distinct ones).

The product of its (nonzero) digits is 22680, while the sum is 36.

The square root of 75049209 is about 8663.0946549140. The cubic root of 75049209 is about 421.8085446598.

The spelling of 75049209 in words is "seventy-five million, forty-nine thousand, two hundred nine".