8873209991 has 2 divisors, whose sum is σ = 8873209992. Its totient is φ = 8873209990.

The previous prime is 8873209981. The next prime is 8873210023. The reversal of 8873209991 is 1999023788.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 8873209991 - 2²⁶ = 8806101127 is a prime.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (8873209921) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4436604995 + 4436604996.

It is an arithmetic number, because the mean of its divisors is an integer number (4436604996).

Almost surely, 2^8873209991 is an apocalyptic number.

8873209991 is a deficient number, since it is larger than the sum of its proper divisors (1).

8873209991 is an equidigital number, since it uses as much as digits as its factorization.

8873209991 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1959552, while the sum is 56.

The square root of 8873209991 is about 94197.7175466582. The cubic root of 8873209991 is about 2070.2696709666.

The spelling of 8873209991 in words is "eight billion, eight hundred seventy-three million, two hundred nine thousand, nine hundred ninety-one".