6371639 has 4 divisors (see below), whose sum is σ = 6437424. Its totient is φ = 6305856.

The previous prime is 6371627. The next prime is 6371641. The reversal of 6371639 is 9361736.

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 6371639 - 2⁴ = 6371623 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 6371599 and 6371608.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6371699) 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, 32747 + ... + 32940.

It is an arithmetic number, because the mean of its divisors is an integer number (1609356).

Almost surely, 2^6371639 is an apocalyptic number.

6371639 is a deficient number, since it is larger than the sum of its proper divisors (65785).

6371639 is an equidigital number, since it uses as much as digits as its factorization.

6371639 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 65784.

The product of its digits is 20412, while the sum is 35.

The square root of 6371639 is about 2524.2105696633. The cubic root of 6371639 is about 185.3888970293.

The spelling of 6371639 in words is "six million, three hundred seventy-one thousand, six hundred thirty-nine".