98091191 has 6 divisors (see below), whose sum is σ = 107819376. Its totient is φ = 89173700.

The previous prime is 98091187. The next prime is 98091193. The reversal of 98091191 is 19119089.

It is a happy number.

It is not a de Polignac number, because 98091191 - 2² = 98091187 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (98091193) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 405215 + ... + 405456.

It is an arithmetic number, because the mean of its divisors is an integer number (17969896).

Almost surely, 2^98091191 is an apocalyptic number.

98091191 is a deficient number, since it is larger than the sum of its proper divisors (9728185).

98091191 is a wasteful number, since it uses less digits than its factorization.

98091191 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 810693 (or 810682 counting only the distinct ones).

The product of its (nonzero) digits is 5832, while the sum is 38.

The square root of 98091191 is about 9904.0997066871. The cubic root of 98091191 is about 461.1865883749.

The spelling of 98091191 in words is "ninety-eight million, ninety-one thousand, one hundred ninety-one".