7921023 has 12 divisors (see below), whose sum is σ = 11609304. Its totient is φ = 4800400.

The previous prime is 7921021. The next prime is 7921057. The reversal of 7921023 is 3201297.

It is not a de Polignac number, because 7921023 - 2¹ = 7921021 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 7920984 and 7921002.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7921021) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 10548 + ... + 11273.

It is an arithmetic number, because the mean of its divisors is an integer number (967442).

Almost surely, 2^7921023 is an apocalyptic number.

7921023 is a deficient number, since it is larger than the sum of its proper divisors (3688281).

7921023 is a wasteful number, since it uses less digits than its factorization.

7921023 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21846 (or 21835 counting only the distinct ones).

The product of its (nonzero) digits is 756, while the sum is 24.

The square root of 7921023 is about 2814.4312036360. The cubic root of 7921023 is about 199.3396806242.

The spelling of 7921023 in words is "seven million, nine hundred twenty-one thousand, twenty-three".