6988231 has 4 divisors (see below), whose sum is σ = 7150792. Its totient is φ = 6825672.

The previous prime is 6988213. The next prime is 6988243. The reversal of 6988231 is 1328896.

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 6988231 - 2⁵ = 6988199 is a prime.

It is a super-2 number, since 2×6988231² = 97670745018722, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6988211) 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, 81216 + ... + 81301.

It is an arithmetic number, because the mean of its divisors is an integer number (1787698).

Almost surely, 2^6988231 is an apocalyptic number.

6988231 is a deficient number, since it is larger than the sum of its proper divisors (162561).

6988231 is a wasteful number, since it uses less digits than its factorization.

6988231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 162560.

The product of its digits is 20736, while the sum is 37.

The square root of 6988231 is about 2643.5262434862. The cubic root of 6988231 is about 191.1858520107.

The spelling of 6988231 in words is "six million, nine hundred eighty-eight thousand, two hundred thirty-one".