6890818971 has 4 divisors (see below), whose sum is σ = 9187758632. Its totient is φ = 4593879312.

The previous prime is 6890818951. The next prime is 6890819011. The reversal of 6890818971 is 1798180986.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 6890818971 - 2¹¹ = 6890816923 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6890818931) 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, 1148469826 + ... + 1148469831.

It is an arithmetic number, because the mean of its divisors is an integer number (2296939658).

Almost surely, 2^6890818971 is an apocalyptic number.

6890818971 is a deficient number, since it is larger than the sum of its proper divisors (2296939661).

6890818971 is a wasteful number, since it uses less digits than its factorization.

6890818971 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2296939660.

The product of its (nonzero) digits is 1741824, while the sum is 57.

The square root of 6890818971 is about 83010.9569334073. The cubic root of 6890818971 is about 1902.9335082708.

The spelling of 6890818971 in words is "six billion, eight hundred ninety million, eight hundred eighteen thousand, nine hundred seventy-one".