9171661 has 4 divisors (see below), whose sum is σ = 9654400. Its totient is φ = 8688924.

The previous prime is 9171649. The next prime is 9171677. The reversal of 9171661 is 1661719.

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: 1661719 = 89 ⋅18671.

It is a cyclic number.

It is not a de Polignac number, because 9171661 - 2¹⁷ = 9040589 is a prime.

It is a super-3 number, since 3×9171661³ (a number of 22 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9171601) 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, 241341 + ... + 241378.

It is an arithmetic number, because the mean of its divisors is an integer number (2413600).

Almost surely, 2^9171661 is an apocalyptic number.

It is an amenable number.

9171661 is a deficient number, since it is larger than the sum of its proper divisors (482739).

9171661 is a wasteful number, since it uses less digits than its factorization.

9171661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 482738.

The product of its digits is 2268, while the sum is 31.

The square root of 9171661 is about 3028.4750287892. The cubic root of 9171661 is about 209.3225409824.

The spelling of 9171661 in words is "nine million, one hundred seventy-one thousand, six hundred sixty-one".