78709711 has 4 divisors (see below), whose sum is σ = 83339712. Its totient is φ = 74079712.

The previous prime is 78709691. The next prime is 78709727. The reversal of 78709711 is 11790787.

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

It is a cyclic number.

It is not a de Polignac number, because 78709711 - 2⁵ = 78709679 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78709751) 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, 2314975 + ... + 2315008.

It is an arithmetic number, because the mean of its divisors is an integer number (20834928).

Almost surely, 2^78709711 is an apocalyptic number.

78709711 is a deficient number, since it is larger than the sum of its proper divisors (4630001).

78709711 is a wasteful number, since it uses less digits than its factorization.

78709711 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4630000.

The product of its (nonzero) digits is 24696, while the sum is 40.

The square root of 78709711 is about 8871.8493562504. The cubic root of 78709711 is about 428.5578348757.

The spelling of 78709711 in words is "seventy-eight million, seven hundred nine thousand, seven hundred eleven".