7638993 has 12 divisors (see below), whose sum is σ = 11291280. Its totient is φ = 4973976.

The previous prime is 7638991. The next prime is 7639031. The reversal of 7638993 is 3998367.

It is a happy number.

7638993 is a `hidden beast` number, since 7 + 638 + 9 + 9 + 3 = 666.

It is not a de Polignac number, because 7638993 - 2¹ = 7638991 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (7638991) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 9483 + ... + 10256.

It is an arithmetic number, because the mean of its divisors is an integer number (940940).

Almost surely, 2^7638993 is an apocalyptic number.

It is an amenable number.

7638993 is a deficient number, since it is larger than the sum of its proper divisors (3652287).

7638993 is a wasteful number, since it uses less digits than its factorization.

7638993 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19788 (or 19785 counting only the distinct ones).

The product of its digits is 244944, while the sum is 45.

The square root of 7638993 is about 2763.8728263073. The cubic root of 7638993 is about 196.9451864644.

The spelling of 7638993 in words is "seven million, six hundred thirty-eight thousand, nine hundred ninety-three".