75734509 has 4 divisors (see below), whose sum is σ = 77163516. Its totient is φ = 74305504.

The previous prime is 75734501. The next prime is 75734537. The reversal of 75734509 is 90543757.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 90543757 = 1249 ⋅72493.

It can be written as a sum of positive squares in 2 ways, for example, as 31472100 + 44262409 = 5610^2 + 6653^2 .

It is a cyclic number.

It is not a de Polignac number, because 75734509 - 2³ = 75734501 is a prime.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (75734501) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 714424 + ... + 714529.

It is an arithmetic number, because the mean of its divisors is an integer number (19290879).

Almost surely, 2^75734509 is an apocalyptic number.

It is an amenable number.

75734509 is a deficient number, since it is larger than the sum of its proper divisors (1429007).

75734509 is a wasteful number, since it uses less digits than its factorization.

75734509 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1429006.

The product of its (nonzero) digits is 132300, while the sum is 40.

The square root of 75734509 is about 8702.5576125643. The cubic root of 75734509 is about 423.0885491808.

The spelling of 75734509 in words is "seventy-five million, seven hundred thirty-four thousand, five hundred nine".