6989997 has 16 divisors (see below), whose sum is σ = 10870400. Its totient is φ = 3993696.

The previous prime is 6989987. The next prime is 6990001. The reversal of 6989997 is 7999896.

It is not a de Polignac number, because 6989997 - 2⁶ = 6989933 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6989947) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2368 + ... + 4425.

It is an arithmetic number, because the mean of its divisors is an integer number (679400).

Almost surely, 2^6989997 is an apocalyptic number.

It is an amenable number.

6989997 is a deficient number, since it is larger than the sum of its proper divisors (3880403).

6989997 is an equidigital number, since it uses as much as digits as its factorization.

6989997 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6817 (or 6803 counting only the distinct ones).

The product of its digits is 2204496, while the sum is 57.

The square root of 6989997 is about 2643.8602459283. The cubic root of 6989997 is about 191.2019555509.

It can be divided in two parts, 69899 and 97, that added together give a palindrome (69996).

The spelling of 6989997 in words is "six million, nine hundred eighty-nine thousand, nine hundred ninety-seven".