6989731 has 8 divisors (see below), whose sum is σ = 8006400. Its totient is φ = 5977608.

The previous prime is 6989729. The next prime is 6989743. The reversal of 6989731 is 1379896.

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

It is not a de Polignac number, because 6989731 - 2¹ = 6989729 is a prime.

It is a super-2 number, since 2×6989731² = 97712678904722, which contains 22 as substring.

It is an Ulam number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6989761) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3360 + ... + 5026.

It is an arithmetic number, because the mean of its divisors is an integer number (1000800).

Almost surely, 2^6989731 is an apocalyptic number.

6989731 is a deficient number, since it is larger than the sum of its proper divisors (1016669).

6989731 is a wasteful number, since it uses less digits than its factorization.

6989731 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2273.

The product of its digits is 81648, while the sum is 43.

The square root of 6989731 is about 2643.8099402189. The cubic root of 6989731 is about 191.1995301629.

The spelling of 6989731 in words is "six million, nine hundred eighty-nine thousand, seven hundred thirty-one".