78678359 has 4 divisors (see below), whose sum is σ = 78702480. Its totient is φ = 78654240.

The previous prime is 78678343. The next prime is 78678367. The reversal of 78678359 is 95387687.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 95387687 = 1447 ⋅65921.

It is a cyclic number.

It is not a de Polignac number, because 78678359 - 2⁴ = 78678343 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 78678359.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78678389) 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, 6227 + ... + 14004.

It is an arithmetic number, because the mean of its divisors is an integer number (19675620).

Almost surely, 2^78678359 is an apocalyptic number.

78678359 is a deficient number, since it is larger than the sum of its proper divisors (24121).

78678359 is a wasteful number, since it uses less digits than its factorization.

78678359 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24120.

The product of its digits is 2540160, while the sum is 53.

The square root of 78678359 is about 8870.0822431362. The cubic root of 78678359 is about 428.5009256352.

The spelling of 78678359 in words is "seventy-eight million, six hundred seventy-eight thousand, three hundred fifty-nine".