9872840099 has 2 divisors, whose sum is σ = 9872840100. Its totient is φ = 9872840098.

The previous prime is 9872840093. The next prime is 9872840111. The reversal of 9872840099 is 9900482789.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 9872840099 - 2⁸ = 9872839843 is a prime.

It is not a weakly prime, because it can be changed into another prime (9872840093) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4936420049 + 4936420050.

It is an arithmetic number, because the mean of its divisors is an integer number (4936420050).

Almost surely, 2^9872840099 is an apocalyptic number.

9872840099 is a deficient number, since it is larger than the sum of its proper divisors (1).

9872840099 is an equidigital number, since it uses as much as digits as its factorization.

9872840099 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2612736, while the sum is 56.

The square root of 9872840099 is about 99362.1663360859. The cubic root of 9872840099 is about 2145.2637837020.

The spelling of 9872840099 in words is "nine billion, eight hundred seventy-two million, eight hundred forty thousand, ninety-nine".