3638737 has 4 divisors (see below), whose sum is σ = 3645040. Its totient is φ = 3632436.

The previous prime is 3638699. The next prime is 3638753. The reversal of 3638737 is 7378363.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 3638737 - 2¹⁵ = 3605969 is a prime.

It is a Duffinian number.

3638737 is a lucky number.

It is a junction number, because it is equal to n+sod(n) for n = 3638696 and 3638705.

It is not an unprimeable number, because it can be changed into a prime (3638777) 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, 2187 + ... + 3472.

It is an arithmetic number, because the mean of its divisors is an integer number (911260).

Almost surely, 2^3638737 is an apocalyptic number.

It is an amenable number.

3638737 is a deficient number, since it is larger than the sum of its proper divisors (6303).

3638737 is an equidigital number, since it uses as much as digits as its factorization.

3638737 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6302.

The product of its digits is 63504, while the sum is 37.

The square root of 3638737 is about 1907.5473781796. The cubic root of 3638737 is about 153.8096399819.

The spelling of 3638737 in words is "three million, six hundred thirty-eight thousand, seven hundred thirty-seven".