6891869099 has 2 divisors, whose sum is σ = 6891869100. Its totient is φ = 6891869098.

The previous prime is 6891869081. The next prime is 6891869123. The reversal of 6891869099 is 9909681986.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 6891869099 - 2⁸ = 6891868843 is a prime.

It is not a weakly prime, because it can be changed into another prime (6891869399) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3445934549 + 3445934550.

It is an arithmetic number, because the mean of its divisors is an integer number (3445934550).

Almost surely, 2^6891869099 is an apocalyptic number.

6891869099 is a deficient number, since it is larger than the sum of its proper divisors (1).

6891869099 is an equidigital number, since it uses as much as digits as its factorization.

6891869099 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 15116544, while the sum is 65.

The square root of 6891869099 is about 83017.2819297283. The cubic root of 6891869099 is about 1903.0301693626.

The spelling of 6891869099 in words is "six billion, eight hundred ninety-one million, eight hundred sixty-nine thousand, ninety-nine".