1000098191 has 2 divisors, whose sum is σ = 1000098192. Its totient is φ = 1000098190.

The previous prime is 1000098163. The next prime is 1000098221. The reversal of 1000098191 is 1918900001.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1000098191 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 (1000097191) 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 as a sum of consecutive naturals, namely, 500049095 + 500049096.

It is an arithmetic number, because the mean of its divisors is an integer number (500049096).

Almost surely, 2^1000098191 is an apocalyptic number.

1000098191 is a deficient number, since it is larger than the sum of its proper divisors (1).

1000098191 is an equidigital number, since it uses as much as digits as its factorization.

1000098191 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 648, while the sum is 29.

The square root of 1000098191 is about 31624.3290996030. The cubic root of 1000098191 is about 1000.0327292621.

Adding to 1000098191 its reverse (1918900001), we get a palindrome (2918998192).

The spelling of 1000098191 in words is "one billion, ninety-eight thousand, one hundred ninety-one".