8777472947 has 4 divisors (see below), whose sum is σ = 8833380576. Its totient is φ = 8721565320.

The previous prime is 8777472931. The next prime is 8777472961. The reversal of 8777472947 is 7492747778.

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 8777472947 - 2⁴ = 8777472931 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 8777472947.

It is not an unprimeable number, because it can be changed into a prime (8777472967) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 27953579 + ... + 27953892.

It is an arithmetic number, because the mean of its divisors is an integer number (2208345144).

Almost surely, 2^8777472947 is an apocalyptic number.

8777472947 is a deficient number, since it is larger than the sum of its proper divisors (55907629).

8777472947 is a wasteful number, since it uses less digits than its factorization.

8777472947 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55907628.

The product of its digits is 38723328, while the sum is 62.

The square root of 8777472947 is about 93688.1686607226. The cubic root of 8777472947 is about 2062.7970415253.

The spelling of 8777472947 in words is "eight billion, seven hundred seventy-seven million, four hundred seventy-two thousand, nine hundred forty-seven".