79784555 has 4 divisors (see below), whose sum is σ = 95741472. Its totient is φ = 63827640.

The previous prime is 79784533. The next prime is 79784561. The reversal of 79784555 is 55548797.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 55548797 = 1301 ⋅42697.

It is not a de Polignac number, because 79784555 - 2⁶ = 79784491 is a prime.

It is a Duffinian number.

It is an unprimeable number.

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, 7978451 + ... + 7978460.

It is an arithmetic number, because the mean of its divisors is an integer number (23935368).

Almost surely, 2^79784555 is an apocalyptic number.

79784555 is a deficient number, since it is larger than the sum of its proper divisors (15956917).

79784555 is a wasteful number, since it uses less digits than its factorization.

79784555 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15956916.

The product of its digits is 1764000, while the sum is 50.

The square root of 79784555 is about 8932.2200487897. The cubic root of 79784555 is about 430.4997884406.

The spelling of 79784555 in words is "seventy-nine million, seven hundred eighty-four thousand, five hundred fifty-five".