75444909 has 8 divisors (see below), whose sum is σ = 100758720. Its totient is φ = 50213856.

The previous prime is 75444883. The next prime is 75444911. The reversal of 75444909 is 90944457.

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

It is not a de Polignac number, because 75444909 - 2⁸ = 75444653 is a prime.

It is a Smith number, since the sum of its digits (42) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (75446909) 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, 18529 + ... + 22230.

It is an arithmetic number, because the mean of its divisors is an integer number (12594840).

Almost surely, 2^75444909 is an apocalyptic number.

It is an amenable number.

75444909 is a deficient number, since it is larger than the sum of its proper divisors (25313811).

75444909 is a wasteful number, since it uses less digits than its factorization.

75444909 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41379.

The product of its (nonzero) digits is 181440, while the sum is 42.

The square root of 75444909 is about 8685.9028891647. The cubic root of 75444909 is about 422.5485797810.

The spelling of 75444909 in words is "seventy-five million, four hundred forty-four thousand, nine hundred nine".