6991500089 has 8 divisors (see below), whose sum is σ = 7993298688. Its totient is φ = 5990454720.

The previous prime is 6991500083. The next prime is 6991500097. The reversal of 6991500089 is 9800051996.

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

It is a cyclic number.

It is not a de Polignac number, because 6991500089 - 2⁸ = 6991499833 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (6991500083) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 168272 + ... + 205665.

It is an arithmetic number, because the mean of its divisors is an integer number (999162336).

Almost surely, 2^6991500089 is an apocalyptic number.

It is an amenable number.

6991500089 is a deficient number, since it is larger than the sum of its proper divisors (1001798599).

6991500089 is a wasteful number, since it uses less digits than its factorization.

6991500089 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 376615.

The product of its (nonzero) digits is 174960, while the sum is 47.

The square root of 6991500089 is about 83615.1905397578. The cubic root of 6991500089 is about 1912.1565956056.

The spelling of 6991500089 in words is "six billion, nine hundred ninety-one million, five hundred thousand, eighty-nine".