7117993 has 4 divisors (see below), whose sum is σ = 7123540. Its totient is φ = 7112448.

The previous prime is 7117987. The next prime is 7118077. The reversal of 7117993 is 3997117.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 3229209 + 3888784 = 1797^2 + 1972^2 .

It is a 3-Lehmer number, since φ(7117993) divides (7117993-1)³.

It is a cyclic number.

It is not a de Polignac number, because 7117993 - 2¹³ = 7109801 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (7117973) 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, 253 + ... + 3781.

It is an arithmetic number, because the mean of its divisors is an integer number (1780885).

Almost surely, 2^7117993 is an apocalyptic number.

It is an amenable number.

7117993 is a deficient number, since it is larger than the sum of its proper divisors (5547).

7117993 is a wasteful number, since it uses less digits than its factorization.

7117993 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5546.

The product of its digits is 11907, while the sum is 37.

The square root of 7117993 is about 2667.9567087942. The cubic root of 7117993 is about 192.3619564651.

The spelling of 7117993 in words is "seven million, one hundred seventeen thousand, nine hundred ninety-three".