7792921 has 4 divisors (see below), whose sum is σ = 7819812. Its totient is φ = 7766032.

The previous prime is 7792913. The next prime is 7792931. The reversal of 7792921 is 1292977.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1292977 = 7 ⋅184711.

It can be written as a sum of positive squares in 2 ways, for example, as 7209225 + 583696 = 2685^2 + 764^2 .

It is a cyclic number.

It is not a de Polignac number, because 7792921 - 2³ = 7792913 is a prime.

It is a super-3 number, since 3×7792921³ (a number of 22 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (7792931) 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, 13006 + ... + 13591.

It is an arithmetic number, because the mean of its divisors is an integer number (1954953).

Almost surely, 2^7792921 is an apocalyptic number.

It is an amenable number.

7792921 is a deficient number, since it is larger than the sum of its proper divisors (26891).

7792921 is a wasteful number, since it uses less digits than its factorization.

7792921 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26890.

The product of its digits is 15876, while the sum is 37.

The square root of 7792921 is about 2791.5803767759. The cubic root of 7792921 is about 198.2592342987.

The spelling of 7792921 in words is "seven million, seven hundred ninety-two thousand, nine hundred twenty-one".