4637993 has 4 divisors (see below), whose sum is σ = 4647108. Its totient is φ = 4628880.

The previous prime is 4637981. The next prime is 4638001. The reversal of 4637993 is 3997364.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 1669264 + 2968729 = 1292^2 + 1723^2 .

It is a cyclic number.

It is not a de Polignac number, because 4637993 - 2⁶ = 4637929 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 4637993.

It is not an unprimeable number, because it can be changed into a prime (4637903) 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, 3746 + ... + 4827.

It is an arithmetic number, because the mean of its divisors is an integer number (1161777).

Almost surely, 2^4637993 is an apocalyptic number.

It is an amenable number.

4637993 is a deficient number, since it is larger than the sum of its proper divisors (9115).

4637993 is an equidigital number, since it uses as much as digits as its factorization.

4637993 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9114.

The product of its digits is 122472, while the sum is 41.

The square root of 4637993 is about 2153.6000092868. The cubic root of 4637993 is about 166.7669667384.

The spelling of 4637993 in words is "four million, six hundred thirty-seven thousand, nine hundred ninety-three".