76819109 has 4 divisors (see below), whose sum is σ = 80862240. Its totient is φ = 72775980.

The previous prime is 76819091. The next prime is 76819123. The reversal of 76819109 is 90191867.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 76819109 - 2⁸ = 76818853 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (76819139) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2021537 + ... + 2021574.

It is an arithmetic number, because the mean of its divisors is an integer number (20215560).

Almost surely, 2^76819109 is an apocalyptic number.

It is an amenable number.

76819109 is a deficient number, since it is larger than the sum of its proper divisors (4043131).

76819109 is a wasteful number, since it uses less digits than its factorization.

76819109 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4043130.

The product of its (nonzero) digits is 27216, while the sum is 41.

The square root of 76819109 is about 8764.6511054348. The cubic root of 76819109 is about 425.0986788165.

The spelling of 76819109 in words is "seventy-six million, eight hundred nineteen thousand, one hundred nine".