9409171081 has 4 divisors (see below), whose sum is σ = 9522534672. Its totient is φ = 9295807492.

The previous prime is 9409171073. The next prime is 9409171087. The reversal of 9409171081 is 1801719049.

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.

It is a cyclic number.

It is not a de Polignac number, because 9409171081 - 2³ = 9409171073 is a prime.

It is a super-2 number, since 2×9409171081² (a number of 21 digits) contains 22 as substring.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (9409171087) 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, 56681671 + ... + 56681836.

It is an arithmetic number, because the mean of its divisors is an integer number (2380633668).

Almost surely, 2^9409171081 is an apocalyptic number.

It is an amenable number.

9409171081 is a deficient number, since it is larger than the sum of its proper divisors (113363591).

9409171081 is a wasteful number, since it uses less digits than its factorization.

9409171081 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 113363590.

The product of its (nonzero) digits is 18144, while the sum is 40.

The square root of 9409171081 is about 97000.8818568161. The cubic root of 9409171081 is about 2111.1404241389.

The spelling of 9409171081 in words is "nine billion, four hundred nine million, one hundred seventy-one thousand, eighty-one".