78960779 has 8 divisors (see below), whose sum is σ = 80426400. Its totient is φ = 77500800.

The previous prime is 78960709. The next prime is 78960787. The reversal of 78960779 is 97706987.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-78960779 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 78960779.

It is not an unprimeable number, because it can be changed into a prime (78960709) 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 7 ways as a sum of consecutive naturals, for example, 35459 + ... + 37619.

It is an arithmetic number, because the mean of its divisors is an integer number (10053300).

Almost surely, 2^78960779 is an apocalyptic number.

78960779 is a deficient number, since it is larger than the sum of its proper divisors (1465621).

78960779 is a wasteful number, since it uses less digits than its factorization.

78960779 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2821.

The product of its (nonzero) digits is 1333584, while the sum is 53.

The square root of 78960779 is about 8885.9877897733. The cubic root of 78960779 is about 429.0130220653.

The spelling of 78960779 in words is "seventy-eight million, nine hundred sixty thousand, seven hundred seventy-nine".