78550713 has 6 divisors (see below), whose sum is σ = 113462154. Its totient is φ = 52367136.

The previous prime is 78550691. The next prime is 78550721. The reversal of 78550713 is 31705587.

It can be written as a sum of positive squares in only one way, i.e., 62773929 + 15776784 = 7923^2 + 3972^2 .

It is not a de Polignac number, because 78550713 - 2⁹ = 78550201 is a prime.

It is not an unprimeable number, because it can be changed into a prime (78550753) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 4363920 + ... + 4363937.

It is an arithmetic number, because the mean of its divisors is an integer number (18910359).

Almost surely, 2^78550713 is an apocalyptic number.

It is an amenable number.

78550713 is a deficient number, since it is larger than the sum of its proper divisors (34911441).

78550713 is a wasteful number, since it uses less digits than its factorization.

78550713 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8727863 (or 8727860 counting only the distinct ones).

The product of its (nonzero) digits is 29400, while the sum is 36.

The square root of 78550713 is about 8862.8840114265. The cubic root of 78550713 is about 428.2690701163.

The spelling of 78550713 in words is "seventy-eight million, five hundred fifty thousand, seven hundred thirteen".