8021797 has 4 divisors (see below), whose sum is σ = 9167776. Its totient is φ = 6875820.

The previous prime is 8021791. The next prime is 8021801. The reversal of 8021797 is 7971208.

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 not a de Polignac number, because 8021797 - 2³ = 8021789 is a prime.

It is a Duffinian number.

8021797 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8021791) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 572979 + ... + 572992.

It is an arithmetic number, because the mean of its divisors is an integer number (2291944).

Almost surely, 2^8021797 is an apocalyptic number.

It is an amenable number.

8021797 is a deficient number, since it is larger than the sum of its proper divisors (1145979).

8021797 is a wasteful number, since it uses less digits than its factorization.

8021797 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1145978.

The product of its (nonzero) digits is 7056, while the sum is 34.

The square root of 8021797 is about 2832.2777053107. The cubic root of 8021797 is about 200.1814769474.

The spelling of 8021797 in words is "eight million, twenty-one thousand, seven hundred ninety-seven".