7989923 has 4 divisors (see below), whose sum is σ = 8099448. Its totient is φ = 7880400.

The previous prime is 7989907. The next prime is 7989929. The reversal of 7989923 is 3299897.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 3299897 = 251 ⋅13147.

It is a cyclic number.

It is not a de Polignac number, because 7989923 - 2⁴ = 7989907 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (7989929) 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, 54653 + ... + 54798.

It is an arithmetic number, because the mean of its divisors is an integer number (2024862).

Almost surely, 2^7989923 is an apocalyptic number.

7989923 is a gapful number since it is divisible by the number (73) formed by its first and last digit.

7989923 is a deficient number, since it is larger than the sum of its proper divisors (109525).

7989923 is a wasteful number, since it uses less digits than its factorization.

7989923 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 109524.

The product of its digits is 244944, while the sum is 47.

The square root of 7989923 is about 2826.6451846668. The cubic root of 7989923 is about 199.9159897163.

The spelling of 7989923 in words is "seven million, nine hundred eighty-nine thousand, nine hundred twenty-three".