78539359 has 4 divisors (see below), whose sum is σ = 78658840. Its totient is φ = 78419880.

The previous prime is 78539353. The next prime is 78539381. The reversal of 78539359 is 95393587.

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 78539359 - 2⁹ = 78538847 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 (78539353) 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, 58749 + ... + 60070.

It is an arithmetic number, because the mean of its divisors is an integer number (19664710).

Almost surely, 2^78539359 is an apocalyptic number.

78539359 is a deficient number, since it is larger than the sum of its proper divisors (119481).

78539359 is a wasteful number, since it uses less digits than its factorization.

78539359 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 119480.

The product of its digits is 1020600, while the sum is 49.

The square root of 78539359 is about 8862.2434518580. The cubic root of 78539359 is about 428.2484346095.

The spelling of 78539359 in words is "seventy-eight million, five hundred thirty-nine thousand, three hundred fifty-nine".