9471191081 has 4 divisors (see below), whose sum is σ = 10332208464. Its totient is φ = 8610173700.

The previous prime is 9471191057. The next prime is 9471191089. The reversal of 9471191081 is 1801911749.

9471191081 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 1801911749 = 11 ⋅163810159.

It is a cyclic number.

It is not a de Polignac number, because 9471191081 - 2²⁶ = 9404082217 is a prime.

It is a super-2 number, since 2×9471191081² (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 (9471191089) 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, 430508675 + ... + 430508696.

It is an arithmetic number, because the mean of its divisors is an integer number (2583052116).

Almost surely, 2^9471191081 is an apocalyptic number.

It is an amenable number.

9471191081 is a deficient number, since it is larger than the sum of its proper divisors (861017383).

9471191081 is a wasteful number, since it uses less digits than its factorization.

9471191081 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 861017382.

The product of its (nonzero) digits is 18144, while the sum is 41.

The square root of 9471191081 is about 97320.0446002775. The cubic root of 9471191081 is about 2115.7687560050.

The spelling of 9471191081 in words is "nine billion, four hundred seventy-one million, one hundred ninety-one thousand, eighty-one".