78929929 has 24 divisors (see below), whose sum is σ = 91863072. Its totient is φ = 67541760.

The previous prime is 78929923. The next prime is 78929957. The reversal of 78929929 is 92992987.

It is not a de Polignac number, because 78929929 - 2⁷ = 78929801 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 78929929.

It is not an unprimeable number, because it can be changed into a prime (78929923) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 238294 + ... + 238624.

It is an arithmetic number, because the mean of its divisors is an integer number (3827628).

Almost surely, 2^78929929 is an apocalyptic number.

It is an amenable number.

78929929 is a deficient number, since it is larger than the sum of its proper divisors (12933143).

78929929 is a wasteful number, since it uses less digits than its factorization.

78929929 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 457 (or 444 counting only the distinct ones).

The product of its digits is 1469664, while the sum is 55.

The square root of 78929929 is about 8884.2517411429. The cubic root of 78929929 is about 428.9571429486.

The spelling of 78929929 in words is "seventy-eight million, nine hundred twenty-nine thousand, nine hundred twenty-nine".