7138993 has 8 divisors (see below), whose sum is σ = 7545600. Its totient is φ = 6740448.

The previous prime is 7138987. The next prime is 7139009. The reversal of 7138993 is 3998317.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-7138993 is a prime.

It is a Duffinian number.

7138993 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7138973) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 148 + ... + 3781.

It is an arithmetic number, because the mean of its divisors is an integer number (943200).

Almost surely, 2^7138993 is an apocalyptic number.

It is an amenable number.

7138993 is a deficient number, since it is larger than the sum of its proper divisors (406607).

7138993 is a wasteful number, since it uses less digits than its factorization.

7138993 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4031.

The product of its digits is 40824, while the sum is 40.

The square root of 7138993 is about 2671.8894063939. The cubic root of 7138993 is about 192.5509439576.

The spelling of 7138993 in words is "seven million, one hundred thirty-eight thousand, nine hundred ninety-three".