9471257947 has 4 divisors (see below), whose sum is σ = 9471452760. Its totient is φ = 9471063136.

The previous prime is 9471257941. The next prime is 9471257977. The reversal of 9471257947 is 7497521749.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 7497521749 = 47087 ⋅159227.

It is a cyclic number.

It is not a de Polignac number, because 9471257947 - 2¹⁹ = 9470733659 is a prime.

It is a super-2 number, since 2×9471257947² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (9471257941) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 42579 + ... + 144067.

It is an arithmetic number, because the mean of its divisors is an integer number (2367863190).

Almost surely, 2^9471257947 is an apocalyptic number.

9471257947 is a deficient number, since it is larger than the sum of its proper divisors (194813).

9471257947 is a wasteful number, since it uses less digits than its factorization.

9471257947 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 194812.

The product of its digits is 4445280, while the sum is 55.

The square root of 9471257947 is about 97320.3881362996. The cubic root of 9471257947 is about 2115.7737350570.

The spelling of 9471257947 in words is "nine billion, four hundred seventy-one million, two hundred fifty-seven thousand, nine hundred forty-seven".