6991327 has 8 divisors (see below), whose sum is σ = 8176256. Its totient is φ = 5852952.

The previous prime is 6991319. The next prime is 6991363. The reversal of 6991327 is 7231996.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 6991327 - 2³ = 6991319 is a prime.

It is a Duffinian number.

It is a plaindrome in base 16.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6991427) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11313 + ... + 11914.

It is an arithmetic number, because the mean of its divisors is an integer number (1022032).

Almost surely, 2^6991327 is an apocalyptic number.

6991327 is a deficient number, since it is larger than the sum of its proper divisors (1184929).

6991327 is a wasteful number, since it uses less digits than its factorization.

6991327 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23277.

The product of its digits is 20412, while the sum is 37.

The square root of 6991327 is about 2644.1117601191. Note that the first 3 decimals coincide. The cubic root of 6991327 is about 191.2140815682.

The spelling of 6991327 in words is "six million, nine hundred ninety-one thousand, three hundred twenty-seven".