3638087009 has 4 divisors (see below), whose sum is σ = 3640386816. Its totient is φ = 3635787204.

The previous prime is 3638086993. The next prime is 3638087021. The reversal of 3638087009 is 9007808363.

3638087009 is digitally balanced in base 2 and base 3, because in such bases it contains all the possibile digits an equal number of times.

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 3638087009 - 2⁴ = 3638086993 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3638087099) 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, 1147529 + ... + 1150694.

It is an arithmetic number, because the mean of its divisors is an integer number (910096704).

Almost surely, 2^3638087009 is an apocalyptic number.

It is an amenable number.

3638087009 is a deficient number, since it is larger than the sum of its proper divisors (2299807).

3638087009 is a wasteful number, since it uses less digits than its factorization.

3638087009 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2299806.

The product of its (nonzero) digits is 217728, while the sum is 44.

The square root of 3638087009 is about 60316.5566739349. The cubic root of 3638087009 is about 1538.0048104983.

The spelling of 3638087009 in words is "three billion, six hundred thirty-eight million, eighty-seven thousand, nine".