78068929 has 4 divisors (see below), whose sum is σ = 82177840. Its totient is φ = 73960020.

The previous prime is 78068917. The next prime is 78068983. The reversal of 78068929 is 92986087.

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, and also an emirpimes, since its reverse is a distinct semiprime: 92986087 = 5791 ⋅16057.

It is a cyclic number.

It is not a de Polignac number, because 78068929 - 2⁵ = 78068897 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (78068999) 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, 2054427 + ... + 2054464.

It is an arithmetic number, because the mean of its divisors is an integer number (20544460).

Almost surely, 2^78068929 is an apocalyptic number.

It is an amenable number.

78068929 is a deficient number, since it is larger than the sum of its proper divisors (4108911).

78068929 is a wasteful number, since it uses less digits than its factorization.

78068929 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4108910.

The product of its (nonzero) digits is 435456, while the sum is 49.

The square root of 78068929 is about 8835.6623407643. The cubic root of 78068929 is about 427.3916901268.

The spelling of 78068929 in words is "seventy-eight million, sixty-eight thousand, nine hundred twenty-nine".