7947315477 has 12 divisors (see below), whose sum is σ = 11483725344. Its totient is φ = 5296239720.

The previous prime is 7947315473. The next prime is 7947315479. The reversal of 7947315477 is 7745137497.

7947315477 is a `hidden beast` number, since 7 + 94 + 7 + 3 + 1 + 547 + 7 = 666.

It is not a de Polignac number, because 7947315477 - 2² = 7947315473 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7947315473) 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 11 ways as a sum of consecutive naturals, for example, 138463 + ... + 187260.

It is an arithmetic number, because the mean of its divisors is an integer number (956977112).

Almost surely, 2^7947315477 is an apocalyptic number.

It is an amenable number.

7947315477 is a deficient number, since it is larger than the sum of its proper divisors (3536409867).

7947315477 is a wasteful number, since it uses less digits than its factorization.

7947315477 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 328440 (or 328437 counting only the distinct ones).

The product of its digits is 5186160, while the sum is 54.

The square root of 7947315477 is about 89147.7171721183. The cubic root of 7947315477 is about 1995.5999499621.

The spelling of 7947315477 in words is "seven billion, nine hundred forty-seven million, three hundred fifteen thousand, four hundred seventy-seven".