7996321 has 4 divisors (see below), whose sum is σ = 8417200. Its totient is φ = 7575444.

The previous prime is 7996319. The next prime is 7996333. The reversal of 7996321 is 1236997.

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: 1236997 = 233 ⋅5309.

It is a cyclic number.

It is not a de Polignac number, because 7996321 - 2¹ = 7996319 is a prime.

It is a super-2 number, since 2×7996321² = 127882299070082, which contains 22 as substring.

It is a Duffinian number.

7996321 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (7996381) 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, 210411 + ... + 210448.

It is an arithmetic number, because the mean of its divisors is an integer number (2104300).

Almost surely, 2^7996321 is an apocalyptic number.

It is an amenable number.

7996321 is a deficient number, since it is larger than the sum of its proper divisors (420879).

7996321 is a wasteful number, since it uses less digits than its factorization.

7996321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 420878.

The product of its digits is 20412, while the sum is 37.

The square root of 7996321 is about 2827.7766884958. The cubic root of 7996321 is about 199.9693369658.

The spelling of 7996321 in words is "seven million, nine hundred ninety-six thousand, three hundred twenty-one".