78912339 has 32 divisors (see below), whose sum is σ = 121896960. Its totient is φ = 44906400.

The previous prime is 78912299. The next prime is 78912349. The reversal of 78912339 is 93321987.

It is not a de Polignac number, because 78912339 - 2¹¹ = 78910291 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 78912339.

It is not an unprimeable number, because it can be changed into a prime (78912349) 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 31 ways as a sum of consecutive naturals, for example, 79134 + ... + 80124.

It is an arithmetic number, because the mean of its divisors is an integer number (3809280).

Almost surely, 2^78912339 is an apocalyptic number.

78912339 is a deficient number, since it is larger than the sum of its proper divisors (42984621).

78912339 is a wasteful number, since it uses less digits than its factorization.

78912339 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1151.

The product of its digits is 81648, while the sum is 42.

The square root of 78912339 is about 8883.2617320441. The cubic root of 78912339 is about 428.9252753718.

The spelling of 78912339 in words is "seventy-eight million, nine hundred twelve thousand, three hundred thirty-nine".