78965759 has 4 divisors (see below), whose sum is σ = 80802216. Its totient is φ = 77129304.

The previous prime is 78965741. The next prime is 78965801. The reversal of 78965759 is 95756987.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-78965759 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 (78965059) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 918164 + ... + 918249.

It is an arithmetic number, because the mean of its divisors is an integer number (20200554).

Almost surely, 2^78965759 is an apocalyptic number.

78965759 is a deficient number, since it is larger than the sum of its proper divisors (1836457).

78965759 is a wasteful number, since it uses less digits than its factorization.

78965759 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1836456.

The product of its digits is 4762800, while the sum is 56.

The square root of 78965759 is about 8886.2680018104. The cubic root of 78965759 is about 429.0220410574.

The spelling of 78965759 in words is "seventy-eight million, nine hundred sixty-five thousand, seven hundred fifty-nine".