8192921 has 4 divisors (see below), whose sum is σ = 8937744. Its totient is φ = 7448100.

The previous prime is 8192893. The next prime is 8192923. The reversal of 8192921 is 1292918.

It is a happy number.

8192921 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.

It is a de Polignac number, because none of the positive numbers 2^k-8192921 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (8192923) 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, 372395 + ... + 372416.

It is an arithmetic number, because the mean of its divisors is an integer number (2234436).

Almost surely, 2^8192921 is an apocalyptic number.

It is an amenable number.

8192921 is a deficient number, since it is larger than the sum of its proper divisors (744823).

8192921 is a wasteful number, since it uses less digits than its factorization.

8192921 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 744822.

The product of its digits is 2592, while the sum is 32.

The square root of 8192921 is about 2862.3278987565. The cubic root of 8192921 is about 201.5949223048.

The spelling of 8192921 in words is "eight million, one hundred ninety-two thousand, nine hundred twenty-one".