78797711 has 4 divisors (see below), whose sum is σ = 78929424. Its totient is φ = 78666000.

The previous prime is 78797707. The next prime is 78797713. The reversal of 78797711 is 11779787.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 11779787 = 509 ⋅23143.

It is a cyclic number.

It is not a de Polignac number, because 78797711 - 2² = 78797707 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 (78797713) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 64955 + ... + 66156.

It is an arithmetic number, because the mean of its divisors is an integer number (19732356).

Almost surely, 2^78797711 is an apocalyptic number.

78797711 is a deficient number, since it is larger than the sum of its proper divisors (131713).

78797711 is a wasteful number, since it uses less digits than its factorization.

78797711 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 131712.

The product of its digits is 172872, while the sum is 47.

The square root of 78797711 is about 8876.8074779168. The cubic root of 78797711 is about 428.7174892263.

The spelling of 78797711 in words is "seventy-eight million, seven hundred ninety-seven thousand, seven hundred eleven".