78480979 has 4 divisors (see below), whose sum is σ = 78509680. Its totient is φ = 78452280.

The previous prime is 78480973. The next prime is 78481009. The reversal of 78480979 is 97908487.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 97908487 = 109 ⋅898243.

It is a cyclic number.

It is not a de Polignac number, because 78480979 - 2³ = 78480971 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (78480971) 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 3 ways as a sum of consecutive naturals, for example, 9759 + ... + 15880.

It is an arithmetic number, because the mean of its divisors is an integer number (19627420).

Almost surely, 2^78480979 is an apocalyptic number.

78480979 is a deficient number, since it is larger than the sum of its proper divisors (28701).

78480979 is a wasteful number, since it uses less digits than its factorization.

78480979 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28700.

The product of its (nonzero) digits is 1016064, while the sum is 52.

The square root of 78480979 is about 8858.9490911733. The cubic root of 78480979 is about 428.1422995407.

The spelling of 78480979 in words is "seventy-eight million, four hundred eighty thousand, nine hundred seventy-nine".