76842109 has 4 divisors (see below), whose sum is σ = 77063904. Its totient is φ = 76620316.

The previous prime is 76842107. The next prime is 76842151. The reversal of 76842109 is 90124867.

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 76842109 - 2¹ = 76842107 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 (76842107) 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, 110377 + ... + 111070.

It is an arithmetic number, because the mean of its divisors is an integer number (19265976).

Almost surely, 2^76842109 is an apocalyptic number.

It is an amenable number.

76842109 is a deficient number, since it is larger than the sum of its proper divisors (221795).

76842109 is a wasteful number, since it uses less digits than its factorization.

76842109 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 221794.

The product of its (nonzero) digits is 24192, while the sum is 37.

The square root of 76842109 is about 8765.9630959753. The cubic root of 76842109 is about 425.1411000930.

The spelling of 76842109 in words is "seventy-six million, eight hundred forty-two thousand, one hundred nine".