6722387 has 4 divisors (see below), whose sum is σ = 7682736. Its totient is φ = 5762040.

The previous prime is 6722377. The next prime is 6722393. The reversal of 6722387 is 7832276.

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 6722387 - 2¹⁴ = 6706003 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6722377) 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, 480164 + ... + 480177.

It is an arithmetic number, because the mean of its divisors is an integer number (1920684).

Almost surely, 2^6722387 is an apocalyptic number.

6722387 is a deficient number, since it is larger than the sum of its proper divisors (960349).

6722387 is an equidigital number, since it uses as much as digits as its factorization.

6722387 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 960348.

The product of its digits is 28224, while the sum is 35.

The square root of 6722387 is about 2592.7566411061. The cubic root of 6722387 is about 188.7301000905.

The spelling of 6722387 in words is "six million, seven hundred twenty-two thousand, three hundred eighty-seven".