6989897 has 4 divisors (see below), whose sum is σ = 7008720. Its totient is φ = 6971076.

The previous prime is 6989869. The next prime is 6989921. The reversal of 6989897 is 7989896.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 6989897 - 2⁶ = 6989833 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6989497) 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, 8843 + ... + 9600.

It is an arithmetic number, because the mean of its divisors is an integer number (1752180).

Almost surely, 2^6989897 is an apocalyptic number.

It is an amenable number.

6989897 is a deficient number, since it is larger than the sum of its proper divisors (18823).

6989897 is a wasteful number, since it uses less digits than its factorization.

6989897 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18822.

The product of its digits is 1959552, while the sum is 56.

The square root of 6989897 is about 2643.8413341197. The cubic root of 6989897 is about 191.2010437581.

Subtracting 6989897 from its reverse (7989896), we obtain a palindrome (999999).

The spelling of 6989897 in words is "six million, nine hundred eighty-nine thousand, eight hundred ninety-seven".