3638743 has 4 divisors (see below), whose sum is σ = 3643920. Its totient is φ = 3633568.

The previous prime is 3638699. The next prime is 3638753. The reversal of 3638743 is 3478363.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 3638743 - 2¹⁷ = 3507671 is a prime.

It is an alternating number because its digits alternate between odd and even.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 3638699 and 3638708.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3638753) 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, 1330 + ... + 3007.

It is an arithmetic number, because the mean of its divisors is an integer number (910980).

Almost surely, 2^3638743 is an apocalyptic number.

3638743 is a deficient number, since it is larger than the sum of its proper divisors (5177).

3638743 is an equidigital number, since it uses as much as digits as its factorization.

3638743 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5176.

The product of its digits is 36288, while the sum is 34.

The square root of 3638743 is about 1907.5489508791. The cubic root of 3638743 is about 153.8097245220.

The spelling of 3638743 in words is "three million, six hundred thirty-eight thousand, seven hundred forty-three".