8189191001 has 2 divisors, whose sum is σ = 8189191002. Its totient is φ = 8189191000.

The previous prime is 8189190983. The next prime is 8189191039. The reversal of 8189191001 is 1001919818.

It is an a-pointer prime, because the next prime (8189191039) can be obtained adding 8189191001 to its sum of digits (38).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 7604712025 + 584478976 = 87205^2 + 24176^2 .

It is a cyclic number.

It is not a de Polignac number, because 8189191001 - 2¹⁰ = 8189189977 is a prime.

It is not a weakly prime, because it can be changed into another prime (8189191051) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4094595500 + 4094595501.

It is an arithmetic number, because the mean of its divisors is an integer number (4094595501).

Almost surely, 2^8189191001 is an apocalyptic number.

It is an amenable number.

8189191001 is a deficient number, since it is larger than the sum of its proper divisors (1).

8189191001 is an equidigital number, since it uses as much as digits as its factorization.

8189191001 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5184, while the sum is 38.

The square root of 8189191001 is about 90494.1489876555. The cubic root of 8189191001 is about 2015.6432422301.

The spelling of 8189191001 in words is "eight billion, one hundred eighty-nine million, one hundred ninety-one thousand, one".