7748979547 has 4 divisors (see below), whose sum is σ = 7858120176. Its totient is φ = 7639838920.

The previous prime is 7748979509. The next prime is 7748979569. The reversal of 7748979547 is 7459798477.

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

It is a cyclic number.

It is not a de Polignac number, because 7748979547 - 2¹⁹ = 7748455259 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (7748979587) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 54570208 + ... + 54570349.

It is an arithmetic number, because the mean of its divisors is an integer number (1964530044).

Almost surely, 2^7748979547 is an apocalyptic number.

7748979547 is a deficient number, since it is larger than the sum of its proper divisors (109140629).

7748979547 is a wasteful number, since it uses less digits than its factorization.

7748979547 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 109140628.

The product of its digits is 124467840, while the sum is 67.

The square root of 7748979547 is about 88028.2883339214. The cubic root of 7748979547 is about 1978.8589442026.

The spelling of 7748979547 in words is "seven billion, seven hundred forty-eight million, nine hundred seventy-nine thousand, five hundred forty-seven".