947824979 has 4 divisors (see below), whose sum is σ = 950465520. Its totient is φ = 945184440.

The previous prime is 947824973. The next prime is 947825017. The reversal of 947824979 is 979428749.

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 947824979 - 2¹⁶ = 947759443 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (947824973) 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, 1319732 + ... + 1320449.

It is an arithmetic number, because the mean of its divisors is an integer number (237616380).

Almost surely, 2^947824979 is an apocalyptic number.

947824979 is a deficient number, since it is larger than the sum of its proper divisors (2640541).

947824979 is a wasteful number, since it uses less digits than its factorization.

947824979 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2640540.

The product of its digits is 9144576, while the sum is 59.

The square root of 947824979 is about 30786.7662965762. The cubic root of 947824979 is about 982.2967714551.

The spelling of 947824979 in words is "nine hundred forty-seven million, eight hundred twenty-four thousand, nine hundred seventy-nine".