6897128167 has 4 divisors (see below), whose sum is σ = 6900261160. Its totient is φ = 6893995176.

The previous prime is 6897128141. The next prime is 6897128177. The reversal of 6897128167 is 7618217986.

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 6897128167 - 2⁷ = 6897128039 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 (6897128177) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1563192 + ... + 1567597.

It is an arithmetic number, because the mean of its divisors is an integer number (1725065290).

Almost surely, 2^6897128167 is an apocalyptic number.

6897128167 is a deficient number, since it is larger than the sum of its proper divisors (3132993).

6897128167 is a wasteful number, since it uses less digits than its factorization.

6897128167 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3132992.

The product of its digits is 2032128, while the sum is 55.

The square root of 6897128167 is about 83048.9504268416. The cubic root of 6897128167 is about 1903.5141029330.

The spelling of 6897128167 in words is "six billion, eight hundred ninety-seven million, one hundred twenty-eight thousand, one hundred sixty-seven".