78789311 has 4 divisors (see below), whose sum is σ = 78881472. Its totient is φ = 78697152.

The previous prime is 78789301. The next prime is 78789313. The reversal of 78789311 is 11398787.

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 78789311 - 2¹⁰ = 78788287 is a prime.

It is a Duffinian number.

It is a plaindrome in base 12.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78789313) 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, 44786 + ... + 46511.

It is an arithmetic number, because the mean of its divisors is an integer number (19720368).

Almost surely, 2^78789311 is an apocalyptic number.

78789311 is a deficient number, since it is larger than the sum of its proper divisors (92161).

78789311 is an equidigital number, since it uses as much as digits as its factorization.

78789311 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 92160.

The product of its digits is 84672, while the sum is 44.

The square root of 78789311 is about 8876.3343222301. The cubic root of 78789311 is about 428.7022546260.

The spelling of 78789311 in words is "seventy-eight million, seven hundred eighty-nine thousand, three hundred eleven".