7921331 has 8 divisors (see below), whose sum is σ = 8842944. Its totient is φ = 7033320.

The previous prime is 7921313. The next prime is 7921351. The reversal of 7921331 is 1331297.

7921331 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 7921331 - 2¹⁴ = 7904947 is a prime.

It is a super-2 number, since 2×7921331² = 125494969623122, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 7921331.

It is not an unprimeable number, because it can be changed into a prime (7921351) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7901 + ... + 8846.

It is an arithmetic number, because the mean of its divisors is an integer number (1105368).

Almost surely, 2^7921331 is an apocalyptic number.

7921331 is a deficient number, since it is larger than the sum of its proper divisors (921613).

7921331 is a wasteful number, since it uses less digits than its factorization.

7921331 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16801.

The product of its digits is 1134, while the sum is 26.

The square root of 7921331 is about 2814.4859210875. The cubic root of 7921331 is about 199.3422642899.

The spelling of 7921331 in words is "seven million, nine hundred twenty-one thousand, three hundred thirty-one".