76852109 has 4 divisors (see below), whose sum is σ = 76923516. Its totient is φ = 76780704.

The previous prime is 76852099. The next prime is 76852129. The reversal of 76852109 is 90125867.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 90125867 = 13 ⋅6932759.

It can be written as a sum of positive squares in 2 ways, for example, as 33988900 + 42863209 = 5830^2 + 6547^2 .

It is a cyclic number.

It is not a de Polignac number, because 76852109 - 2²⁴ = 60074893 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (76852129) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 34064 + ... + 36249.

It is an arithmetic number, because the mean of its divisors is an integer number (19230879).

Almost surely, 2^76852109 is an apocalyptic number.

It is an amenable number.

76852109 is a deficient number, since it is larger than the sum of its proper divisors (71407).

76852109 is a wasteful number, since it uses less digits than its factorization.

76852109 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 71406.

The product of its (nonzero) digits is 30240, while the sum is 38.

The square root of 76852109 is about 8766.5334654012. The cubic root of 76852109 is about 425.1595414860.

The spelling of 76852109 in words is "seventy-six million, eight hundred fifty-two thousand, one hundred nine".