9164168021 has 4 divisors (see below), whose sum is σ = 9168266892. Its totient is φ = 9160069152.

The previous prime is 9164167973. The next prime is 9164168051. The reversal of 9164168021 is 1208614619.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 3992976100 + 5171191921 = 63190^2 + 71911^2 .

It is a cyclic number.

It is not a de Polignac number, because 9164168021 - 2¹⁴ = 9164151637 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9164168051) 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, 2046080 + ... + 2050553.

It is an arithmetic number, because the mean of its divisors is an integer number (2292066723).

Almost surely, 2^9164168021 is an apocalyptic number.

It is an amenable number.

9164168021 is a deficient number, since it is larger than the sum of its proper divisors (4098871).

9164168021 is a wasteful number, since it uses less digits than its factorization.

9164168021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4098870.

The product of its (nonzero) digits is 20736, while the sum is 38.

The square root of 9164168021 is about 95729.6611348855. The cubic root of 9164168021 is about 2092.6552198571.

The spelling of 9164168021 in words is "nine billion, one hundred sixty-four million, one hundred sixty-eight thousand, twenty-one".