78714729 has 24 divisors (see below), whose sum is σ = 118310400. Its totient is φ = 50369760.

The previous prime is 78714721. The next prime is 78714733. The reversal of 78714729 is 92741787.

It is a happy number.

It is not a de Polignac number, because 78714729 - 2³ = 78714721 is a prime.

It is not an unprimeable number, because it can be changed into a prime (78714721) 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 23 ways as a sum of consecutive naturals, for example, 49062 + ... + 50640.

It is an arithmetic number, because the mean of its divisors is an integer number (4929600).

Almost surely, 2^78714729 is an apocalyptic number.

It is an amenable number.

78714729 is a deficient number, since it is larger than the sum of its proper divisors (39595671).

78714729 is a wasteful number, since it uses less digits than its factorization.

78714729 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1805 (or 1802 counting only the distinct ones).

The product of its digits is 197568, while the sum is 45.

The square root of 78714729 is about 8872.1321563647. The cubic root of 78714729 is about 428.5669420007.

The spelling of 78714729 in words is "seventy-eight million, seven hundred fourteen thousand, seven hundred twenty-nine".