78713771 has 4 divisors (see below), whose sum is σ = 78895992. Its totient is φ = 78531552.

The previous prime is 78713749. The next prime is 78713807. The reversal of 78713771 is 17731787.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-78713771 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (78713731) 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, 90461 + ... + 91326.

It is an arithmetic number, because the mean of its divisors is an integer number (19723998).

Almost surely, 2^78713771 is an apocalyptic number.

78713771 is a deficient number, since it is larger than the sum of its proper divisors (182221).

78713771 is a wasteful number, since it uses less digits than its factorization.

78713771 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 182220.

The product of its digits is 57624, while the sum is 41.

The square root of 78713771 is about 8872.0781669235. The cubic root of 78713771 is about 428.5652033646.

The spelling of 78713771 in words is "seventy-eight million, seven hundred thirteen thousand, seven hundred seventy-one".