78930829 has 4 divisors (see below), whose sum is σ = 79063200. Its totient is φ = 78798460.

The previous prime is 78930821. The next prime is 78930869. The reversal of 78930829 is 92803987.

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 78930829 - 2³ = 78930821 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 (78930821) 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, 65287 + ... + 66484.

It is an arithmetic number, because the mean of its divisors is an integer number (19765800).

Almost surely, 2^78930829 is an apocalyptic number.

It is an amenable number.

78930829 is a deficient number, since it is larger than the sum of its proper divisors (132371).

78930829 is a wasteful number, since it uses less digits than its factorization.

78930829 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 132370.

The product of its (nonzero) digits is 217728, while the sum is 46.

The square root of 78930829 is about 8884.3023924223. The cubic root of 78930829 is about 428.9587733397.

The spelling of 78930829 in words is "seventy-eight million, nine hundred thirty thousand, eight hundred twenty-nine".