78814711 has 4 divisors (see below), whose sum is σ = 78832552. Its totient is φ = 78796872.

The previous prime is 78814693. The next prime is 78814733. The reversal of 78814711 is 11741887.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-78814711 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 (78814781) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3160 + ... + 12946.

It is an arithmetic number, because the mean of its divisors is an integer number (19708138).

Almost surely, 2^78814711 is an apocalyptic number.

78814711 is a deficient number, since it is larger than the sum of its proper divisors (17841).

78814711 is an equidigital number, since it uses as much as digits as its factorization.

78814711 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17840.

The product of its digits is 12544, while the sum is 37.

The square root of 78814711 is about 8877.7649777407. The cubic root of 78814711 is about 428.7483178428.

The spelling of 78814711 in words is "seventy-eight million, eight hundred fourteen thousand, seven hundred eleven".