7128993 has 4 divisors (see below), whose sum is σ = 9505328. Its totient is φ = 4752660.

The previous prime is 7128991. The next prime is 7128997. The reversal of 7128993 is 3998217.

7128993 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

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: 3998217 = 3 ⋅1332739.

It is not a de Polignac number, because 7128993 - 2¹ = 7128991 is a prime.

It is a Duffinian number.

It is a zygodrome in base 7.

It is not an unprimeable number, because it can be changed into a prime (7128991) 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, 1188163 + ... + 1188168.

It is an arithmetic number, because the mean of its divisors is an integer number (2376332).

Almost surely, 2^7128993 is an apocalyptic number.

It is an amenable number.

7128993 is a deficient number, since it is larger than the sum of its proper divisors (2376335).

7128993 is a wasteful number, since it uses less digits than its factorization.

7128993 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2376334.

The product of its digits is 27216, while the sum is 39.

The square root of 7128993 is about 2670.0174156735. The cubic root of 7128993 is about 192.4609962018.

The spelling of 7128993 in words is "seven million, one hundred twenty-eight thousand, nine hundred ninety-three".